Summer paper 2 core

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
International General Certificate of Secondary Education

*3498617057*

0625/02

PHYSICS
Paper 2 Core

May/June 2008
1 hour 15 minutes

Candidates answer on the Question Paper.
No Additional Materials are required.
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
Write in dark blue or black pen.
You may use a soft pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
You may lose marks if you do not show your working or if you do not use
appropriate units.
Take the weight of 1 kg to be 10 N (i.e. acceleration of free fall = 10 m/s2).

For Examiner’s Use

At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part
question.

1
2
3
4
5
6
7
8
9
10
11
12
Total

This document consists of 14 printed pages and 2 blank pages.
SP (SLM/CGW) T41975/6
© UCLES 2008

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2
1

(a) Fig. 1.1 shows a uniform rod.

For
Examiner’s
Use

Fig. 1.1
(i)

Use your rule to find the length of the rod.
length = ...........................................cm

(ii)

[1]

On Fig. 1.1, show the position of the centre of mass of the rod using the letter C.
[1]

(b) Fig. 1.2 shows another rod, of the same length as the previous one, but this rod is thicker
at one end.

Fig. 1.2
Use your judgement to mark with the letter M approximately where the centre of mass
of this rod will be.
[2]
[Total: 4]

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3
2

A motorcyclist is travelling along a country road, as shown in Fig. 2.1.

For
Examiner’s
Use

A

B
1375 m

Fig. 2.1
The statements below describe the motion of the motorcycle from point A to point B.
1.
2.
3.

The motorcycle accelerates uniformly from rest at point A, increasing its speed to
25 m/s in 10 s.
It then travels at a constant speed of 25 m/s for 40 s.
It then decelerates uniformly to rest at point B, 70 s after leaving point A.
35
30
speed
m/s 25
20
15
10
5
0

0

time/s
Fig. 2.2

(a) For the motorcycle moving from point A to point B, draw on Fig. 2.2,
(i)

a suitable time scale,

[1]

(ii)

the graph of the motion of the motorcycle.

[5]

(b) The distance from A to B is 1375 m.
Calculate the average speed of the motorcycle between A and B. Give your answer to
the nearest m/s.

© UCLES 2008

average speed = ..........................................m/s [4]
[Total: 10]
0625/02/M/J/08
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4
3

A beam is pivoted at its centre. Three forces, F1, F2 and F3, act on the beam as shown in
Fig. 3.1.
b

c
a

F1

F2

F3
Fig. 3.1

(a) Which of the forces exert(s)
a clockwise moment,

...................

an anticlockwise moment? ...................

[3]

(b) When the beam is released, the right-hand side of the beam starts to go down.
Which of the three distances, a, b or c, should be decreased in order to balance the
beam? Explain your answer.
Which distance? ..............................................................................................................
Explanation
..........................................................................................................................................
..........................................................................................................................................
...................................................................................................................................... [3]
(c) Fig. 3.2 represents a simple beam-balance with the pivot accurately at its centre.

?
Fig. 3.2
The person using the beam-balance puts the object to be weighed in the left-hand pan.
He has a selection of standard masses to put in the right-hand pan, but he finds he
cannot exactly balance the beam.
His best attempts are
masses used

effect

10 g, 10 g, 5 g, 2 g, 2 g

beam tips down slightly on the left-hand side

20 g, 10 g

beam tips down slightly on the right-hand side

Estimate the mass of the object.
mass = ............................................. g [1]
[Total: 7]
© UCLES 2008

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For
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5
4

(a) An electrician climbs up to the platform
of a special tower, in order to reach a
high-level spotlight, as shown in Fig. 4.1.
Which form of energy, possessed by the
electrician’s body,
(i)

is greater at the top of the tower than
it was at the bottom,
..................................................... [1]

(ii)

is less at the top of the tower than it
was at the bottom?
..................................................... [1]

(b) One of the electrician’s assistants also
climbs up to the platform. The assistant
weighs less than the electrician.
Which of the two people does the most
work climbing up to the platform, and
why?
Which person? ........................................
Why? .......................................................
.................................................................
.................................................................
............................................................. [1]

Fig. 4.1
(c) The electrician wishes to know what power he develops as he climbs the tower.
Which quantities does he need to know in order to do this?
..........................................................................................................................................
...................................................................................................................................... [1]
[Total: 4]

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6
5

In the atomic model, the atom has a central mass. Much smaller particles orbit this central
mass, as shown in Fig. 5.1.
central
mass

orbiting
particles
Fig. 5.1
(a) State the name given to the central mass.
...................................................................................................................................... [1]
(b) State the name given to the orbiting particles.
...................................................................................................................................... [1]
(c) State the names of the particles from which the central mass is made.
........................................................... and .................................................................... [2]
(d) The central mass of the helium atom is identical to one of the particles emitted in
radioactive decay.
Which particle is this? ................................................................................................... [1]
(e) State the name of the particles that form cathode rays.
...................................................................................................................................... [1]
[Total: 6]

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For
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7
6

Fig. 6.1 and Fig. 6.2 show two of the rays from the top of an object, passing through a lens.

object

F2

F1

Fig. 6.1

object

F1

F2

Fig. 6.2
(a) On Fig. 6.1, draw the third ray whose path from the top of the object through the lens is
known.
[1]
(b) On Fig. 6.2,
(i)

copy the ray shown on Fig. 6.1 and complete the diagram to locate the image
formed by the lens,
[1]

(ii)

mark and label the image.

[2]

(c) On Fig. 6.2, indicate clearly where you would position a screen on which to see the
focused image.
[1]
[Total: 5]

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For
Examiner’s
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8
7

(a) The table below describes the conditions of the molecules of a substance in each of the
three states of matter, solid, liquid and gas.
In the right-hand column, write the state of the substance that is described in the lefthand column.
condition of the molecules

state in which the
substance exists

The molecules are a great distance apart, moving
very rapidly, with negligible interaction. The
substance occupies all the space available.
The molecules are only able to vibrate rapidly about
fixed positions. The substance does not need a
container to maintain its shape.
The molecules move about amongst each other,
with attractive forces between them. The substance
does not necessarily fill its container.
[2]
(b) (i)

What is the state of matter just before a substance boils?
.............................................................................................................................. [1]

(ii)

Describe what happens to the molecules during boiling.
..................................................................................................................................
.............................................................................................................................. [2]

(iii)

State two differences between boiling and evaporating.
1. ..............................................................................................................................
2. .......................................................................................................................... [2]

(c) (i)

What is the state of matter just before a substance melts?
.............................................................................................................................. [1]

(ii)

Aluminium melts at 660 °C. At what temperature does it freeze?
.............................................................................................................................. [1]
[Total: 9]

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For
Examiner’s
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9
8

(a) The thermometer in Fig. 8.1 is calibrated at two fixed points, and the space between
these is divided into equal divisions.
-10

0

10

20

30

40

50

60

70

80

90

100

110

Fig. 8.1
A thermometer is being calibrated with the Celsius scale.
(i)

1.

Write down another name for the lower fixed point.

.............................................................................................................................. [1]
2.

How is this temperature achieved?

..................................................................................................................................
..................................................................................................................................
.............................................................................................................................. [2]
3.
(ii)

What is the temperature of this fixed point?................................................... [1]

1.

Write down another name for the upper fixed point.

.............................................................................................................................. [1]
2.

How is this temperature achieved?

..................................................................................................................................
..................................................................................................................................
.............................................................................................................................. [2]
3.

What is the temperature of this fixed point?................................................... [2]

(b) A block of copper and a block of aluminium have identical masses. They both start at
room temperature and are given equal quantities of heat. When the heating is stopped,
the aluminium has a lower temperature than the copper.
Fill in the missing words in the sentence below, to explain this temperature difference.
The aluminium block has a smaller temperature rise than the copper block because the
aluminium block has a larger ................................................ than the copper block.

[1]

[Total: 10]

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10
9

Fuses are often included in circuits.

For
Examiner’s
Use

(a) In the space below, draw the circuit symbol for a fuse.

[1]
(b) When the statements in the boxes below are put in the correct order, they describe how
a fuse protects a circuit.
A
fuse wire heats up

B
circuit is broken,
so current stops

C
fuse wire melts
D
current becomes
too high

On the line below, list the letters of the four boxes in the correct order.
...................................................................................................................................... [2]
(c) By mistake, a fuse with too high a rated value is put in the fuse-holder in a circuit.
State two possible outcomes of this mistake.
1. .....................................................................................................................................
2. ................................................................................................................................. [2]
[Total: 5]

© UCLES 2008

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11
10 Fig. 10.1 shows a series circuit.

X

For
Examiner’s
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R2

R1

Y

Fig. 10.1
Resistance R1 = 25 Ω and resistance R2 = 35 Ω. The cell has zero resistance.
(a) Calculate the combined resistance of R1 and R2.

resistance = ........................................... Ω

[2]

(b) On Fig. 10.1, use the correct circuit symbol to draw a voltmeter connected to measure
the potential difference between X and Y.
[1]
(c) The variable resistor is set to zero resistance. The voltmeter reads 1.5 V.
(i)

Calculate the current in the circuit.

current = .................................................. [4]
(ii)

State the value of the potential difference across the cell.
potential difference = ............................................ V

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[1]

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12
(d) The resistance of the variable resistor is increased.
(i)

For
Examiner’s
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What happens to the current in the circuit? Tick one box.
increases
stays the same
decreases

(ii)

[1]

What happens to the voltmeter reading? Tick one box.
increases
stays the same
decreases

(iii)

[1]

State the resistance of the variable resistor when the voltmeter reads 0.75 V.
resistance = ............................................Ω

[1]

[Total: 11]

© UCLES 2008

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13
11 (a) An experimenter uses a length of wire ABC in an attempt to demonstrate
electromagnetic induction. The wire is connected to a sensitive millivoltmeter G.

B

N
S

A

G

C

Fig. 11.1
Using the arrangement in Fig. 11.1, the experimenter finds that she does not obtain the
expected deflection on G when she moves the wire ABC down through the magnetic
field.
(i)

Explain why there is no deflection shown on G.
..................................................................................................................................
..................................................................................................................................
.............................................................................................................................. [2]

(ii)

What change should be made in order to observe a deflection on G?
..................................................................................................................................
.............................................................................................................................. [1]

(b) Name one device that makes use of electromagnetic induction.
...................................................................................................................................... [1]
[Total: 4]

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14
12 (a) The table below shows how the activity of a sample of a radioactive substance changes
with time.
time/minutes

activity
counts/s

0

128

30

58

60

25

90

11

120

5

Use the data in the table to estimate the half-life of the radioactive substance.
half-life = .........................................min

[2]

(b) The half-lives of various substances are given below.
radon-220
iodine-128
radon-222
strontium-90
(i)

55 seconds
25 minutes
3.8 days
28 years

If the radioactive substance in (a) is one of these four, which one is it?
.............................................................................................................................. [1]

(ii)

A sample of each of these substances is obtained.
Which sample will have the greatest proportion of decayed nuclei by the end of one
year, and why?
Which? .....................................................................................................................
Why? ........................................................................................................................
.............................................................................................................................. [2]
[Total: 5]

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For
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16
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publisher will be pleased to make amends at the earliest possible opportunity.
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0625/02/M/J/08


*8187295232*

0625/02

PHYSICS
Paper 2 Core

May/June 2007
1 hour 15 minutes

DO NOT WRITE IN ANY BARCODES.
You may lose marks if you do not show your working or if you do not use
appropriate units.
The number of marks is given in brackets [ ] at the end of each question or
part question.

1
2
3
4
5
6
7
8
9
10
11
12
Total

This document consists of 19 printed pages and 1 blank page.
SPA (MML 13116 3/06) T25803/4
© UCLES 2007

[Turn over

2
1

The mechanical stop-clock shown in Fig. 1.1 has

and

For
Examiner’s
Use

a seconds hand, which rotates once every minute
a minutes hand, which rotates once every hour.

start
55

reset
60

stop
5
10

50

minutes hand

15

45

seconds hand
20

40
35

30

25

Fig. 1.1
(a) A student uses the clock to time the intervals between trains travelling along the railway
past his school.
He sets the clock to zero (both hands vertical).
As train 1 passes, he starts the clock and leaves it running.
After 35 s, train 2 passes.
On the blank face of Fig. 1.2, show the positions of the two hands of the clock as train 2
passes. Make sure it is clear which hand is which.
[2]

55

60
5
10

50

15

45

20

40
35

30

25

Fig. 1.2

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3
(b) Train 3 passes the school 4 minutes and 55 s after the clock was started.
On the blank face of Fig. 1.3, show the positions of the hands of the clock as train 3
passes.
[2]

55

60
5
10

50

15

45

20

40
35

25

30
Fig. 1.3

(c) Calculate the time interval between train 2 and train 3.

time interval = ............... min ............... s [1]
[Total: 5]

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4
2

In a training session, a racing cyclist’s journey is in three stages.
Stage 1

He accelerates uniformly from rest to 12 m/s in 20 s.

Stage 2

He cycles at 12 m/s for a distance of 4800 m.

Stage 3

For
Examiner’s
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He decelerates uniformly to rest.

The whole journey takes 500 s.
(a) Calculate the time taken for stage 2.

time = ............... s [2]
(b) On the grid of Fig. 2.1, draw a speed/time graph of the cyclist’s ride.
14
12
speed /
m/s

10
8
6
4
2
0
0

100

200

300

400

500
time / s

Fig. 2.1

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[3]

5
(c) Show that the total distance travelled by the cyclist is 5400 m.

For
Examiner’s
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[4]
(d) Calculate the average speed of the cyclist.

average speed = ............... m/s [2]
[Total: 11]

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6
3

A piece of stiff cardboard is stuck to a plank of wood by means of two sticky-tape “hinges”.
This is shown in Fig. 3.1.
stiff
cardboard
sticky-tape “hinge”
A

B

plank of
wood

C

Fig. 3.1
(a) The cardboard is lifted as shown, using a force applied either at A or B or C.
(i)

On Fig. 3.1, draw the force in the position where its value will be as small as
possible.
[2]

(ii)

Explain why the position you have chosen in (a)(i) results in the smallest force.
............................................................................................................................ [1]

(b) Initially, the cardboard is flat on the plank of wood. A box of matches is placed on it. The
cardboard is then slowly raised at the left hand edge, as shown in Fig. 3.2.

stiff
cardboard
plank of
wood

Fig. 3.2
State the condition for the box of matches to fall over.
..........................................................................................................................................
.................................................................................................................................... [2]

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7
(c) The box of matches is opened, as shown in Fig. 3.3. The procedure in (b) is repeated.

stiff
cardboard
plank of
wood

Fig. 3.3
(i)

Complete the sentence below, using either the words “greater than” or “the same
as” or “less than”.
In Fig. 3.3, the angle through which the cardboard can be lifted before
the box of matches falls is …………………………………………… the angle
before the box of matches falls in Fig. 3.2.

(ii)

[1]

Give a reason for your answer to (c)(i).
..................................................................................................................................
............................................................................................................................ [1]
[Total: 7]

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8
4

In Fig. 4.1, a small bird, a large bird and a squirrel are on the ground under a tree.

For
Examiner’s
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Fig. 4.1
A loud noise scares the two birds. They both fly up to the top of the tree.
(a) (i)
(ii)

Which bird does the most work raising itself to the top of the tree? ................... [1]
Explain your answer to (a)(i).
............................................................................................................................ [1]

(b) A squirrel has the same weight as the large bird. It climbs the tree, to the same height
as the birds.
How does the increase in the squirrel’s gravitational potential energy compare with that
of each of the two birds? Answer the question by completing the sentences below.
Compared with that of the small bird, the increase of the squirrel’s potential
energy is ................................................................. .
Compared with that of the large bird, the increase of the squirrel’s potential
energy is ................................................................. .

[2]

(c) Which creature has the least gravitational potential energy when they are at the top of
the tree?
.................................................................................................................................... [1]
(d) The small bird flies back down to the ground.
What happens to the gravitational potential energy it had at the top of the tree?
.................................................................................................................................... [2]
[Total: 7]
© UCLES 2007

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9
5

(a) Here is a list of descriptions of molecules in matter.
description

For
Examiner’s
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solid

gas

free to move around from place to place
can only vibrate about a fixed position
closely packed
relatively far apart
almost no force between molecules
strong forces are involved between molecules

In the columns alongside the descriptions, put ticks next to those which apply to the
molecules in
(i)

a solid,

(ii)

a gas.

[4]

(b) The water in a puddle of rainwater is evaporating.
Describe what happens to the molecules when the water evaporates.
..........................................................................................................................................
.................................................................................................................................... [2]
[Total: 6]

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10
6

(a) Fig. 6.1 shows how the pressure of the gas sealed in a container varies during a period
of time.

pressure

time
Fig. 6.1
Which of the following statements could explain this variation of pressure?
Tick two statements.
The temperature of the gas is increasing.
The temperature of the gas is decreasing.
The volume of the container is increasing.
The volume of the container is decreasing.

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[2]

For
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11
(b) Fig. 6.2 shows some gas trapped in a cylinder with a movable piston.
cylinder

For
Examiner’s
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piston

gas

Fig. 6.2
The temperature of the gas is raised.
(i)

State what must happen to the piston, if anything, in order to keep the pressure of
the gas constant.
............................................................................................................................ [1]

(ii)

State your reasons for your answer to (b)(i).
..................................................................................................................................
............................................................................................................................ [1]
[Total: 4]

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7

An electric soldering iron is used to melt solder, for joining wires in an electric circuit. A
soldering iron is shown in Fig. 7.1.

copper tip

metal cylinder
with heater coil
inside

plastic handle

lead to
electricity
supply
Fig. 7.1
Solder is a metal which melts easily. The heater coil inside the metal cylinder heats the
copper tip.
(a) (i)

Suggest why the tip is made of copper.
............................................................................................................................ [1]

(ii)

Suggest why the handle is made of plastic.
............................................................................................................................ [1]

(b) The heater coil is switched on. When the tip is put in contact with the solder, some of the
heat is used to melt the solder.
(i)

State the process by which the heat is transferred from the copper tip to the solder.
............................................................................................................................ [1]

(ii)

By which process or processes is the rest of the heat transferred to the surroundings?
Tick the boxes alongside any of the following (you may tick as many as you think
are correct).
conduction
convection
evaporation
radiation

© UCLES 2007

[2]

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13
(c) A short time after switching on the soldering iron, it reaches a steady temperature, even
though the heater coil is constantly generating heat.
The soldering iron is rated at 40 W.
What is the rate at which heat is being lost from the soldering iron? Tick one box.
greater than 40 W
equal to 40 W
less than 40 W

[1]
[Total: 6]

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14
8

A square wooden block is made to rotate 3000 times per minute. A springy metal strip presses
against the block, as shown in Fig. 8.1. A person nearby observes what is happening.

3000 rotations / minute

springy
metal strip

Fig. 8.1
(a) Calculate how many times per second the block rotates.

number of rotations per second = ....................... [1]
(b) Calculate the frequency of the sound caused by this arrangement.

frequency = ................ Hz [2]
(c) State whether or not this sound could be heard by the person nearby, and give a reason
for your answer.
..........................................................................................................................................
.................................................................................................................................... [1]
[Total: 4]

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For
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15
9

(a) Fig. 9.1 shows two resistors connected to a 6 V battery.

For
Examiner’s
Use

2Ω
6V

X
10 Ω
Y
Fig. 9.1

(i)

What name do we use to describe this way of connecting resistors?
............................................................................................................................ [1]

(ii)

Calculate the combined resistance of the two resistors.

combined resistance = ..................
(iii)

[1]

Calculate the current in the circuit.

current = ...................... [4]
(iv)

Use your answer to (a)(iii) to calculate the potential difference across the 10
resistor.

potential difference = .................. V [2]
(v)

State the potential difference between terminals X and Y.
.................. V [1]

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16
(b) The circuit in Fig. 9.2 is similar to the circuit in Fig. 9.1, but it uses a resistor AB with a
sliding contact.

A
sliding
contact
6V

X

B

Y

Fig. 9.2
(i)

State the potential difference between X and Y when the sliding contact is at
1.

.............. V

2.
(ii)

end A of the resistor,
end B of the resistor.

.............. V

[2]

The sliding contact of the resistor AB is moved so that the potential difference
between X and Y is 5 V.
On Fig. 9.2, mark with the letter C the position of the sliding contact.

[1]
[Total: 12]

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17
10 Your teacher gives you a length of wire, a sensitive millivoltmeter and a powerful magnet. You
are asked to demonstrate the induction of an e.m.f. in the wire.
(a) Describe what you would do.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
.................................................................................................................................... [2]
(b) How would you know that an e.m.f. has been induced?
.................................................................................................................................... [1]
(c) Name a device which makes use of electromagnetic induction.
.................................................................................................................................... [1]
[Total: 4]

© UCLES 2007

0625/02/M/J/07

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For
Examiner’s
Use

18
11 Fig. 11.1 shows a bar magnet on a board in a region where the magnetic field of the
surroundings is so weak it can be ignored. The letters N and S show the positions of the
north and south poles of the magnet. Also on the diagram are marked four dots.

N

S

Fig. 11.1
(a) On Fig. 11.1, carefully draw four magnetic field lines, one passing through each of the
four dots. The lines you draw should begin and end either on the magnet or at the edge
of the board.
[5]
(b) On one of your lines, put an arrow to show the direction of the magnetic field.

[1]
[Total: 6]

© UCLES 2007

0625/02/M/J/07

For
Examiner’s
Use

19
12 Three particles you have learned about are

For
Examiner’s
Use

protons, neutrons and electrons.
(a) How many of each of these particles
(i)

are found in an -particle,
number of protons

= ...................

number of neutrons = ...................
number of electrons = ...................
(ii)

[1]

are found in a -particle?
number of protons

= ...................

number of neutrons = ...................
number of electrons = ...................

[1]

(b) Sodium-24 can be represented as 24Na.
11
How many of each of these particles are there in a neutral atom of 24Na?
11
number of protons

= .....................

number of neutrons = .....................
number of electrons = .....................

[3]

(c) A nucleus of sodium-24 decays to become magnesium-24, by the emission of one
particle. The equation below describes this change.
x
The symbol y represents the emitted particle.
24Na
11

24 Mg
12

+

x
y

(i)

State the value of x.

....................

[1]

(ii)

State the value of y.

....................

[1]

(iii)

What type of particle is ? ....................

[1]
[Total: 8]

© UCLES 2007

0625/02/M/J/07

20
BLANK PAGE

University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of
Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.

0625/02/M/J/07

Centre Number

Candidate Number

Name


0625/02

PHYSICS
Paper 2 Core

May/June 2006
1 hour 15 minutes

You may lose marks if you do not show your working or if you do not use appropriate units.
The number of marks is given in brackets [ ] at the end of each question or part question.


This document consists of 16 printed pages.
MML 10757 3/05 S99216/2
© UCLES 2006

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2
1

(a) For a special parade, the guest of honour is to sit on a chair whilst the parade passes
by. Unfortunately the ground beneath the chair is soft, so the parade organisers put the
chair on a large flat board, as shown in Fig. 1.1.
chair
board

soft
ground

Fig. 1.1
Explain why the board prevents the chair from sinking into the ground.
..........................................................................................................................................
.................................................................................................................................... [2]
(b) At the parade, some air-filled balloons are used as decorations, as shown in Fig. 1.2.

Fig. 1.2
(i) State what happens to the balloons when the Sun makes them hotter.
............................................................................................................................ [1]
(ii) In terms of molecules, explain your answer to (b)(i).
..................................................................................................................................
............................................................................................................................ [2]

© UCLES 2006

0625/02/M/J/06

For
Examiner's
Use

3
(c) A pump is used to pump up the balloons in (b). A valve in the pump becomes blocked,
as shown in Fig. 1.3.

blocked
valve

air

For
Examiner's
Use

piston

direction of motion of piston
Fig. 1.3
(i) The piston of the pump is pushed in. State what happens to the pressure of the air
trapped in the pump.
............................................................................................................................ [1]
(ii) In terms of molecules, explain your answer to (c)(i).
..................................................................................................................................
............................................................................................................................ [3]

© UCLES 2006

0625/02/M/J/06

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4
2

For
Examiner's
Use

Fig. 2.1 is a full-size diagram of a rectangular block.

D

A

C
B
Fig. 2.1
(a) Use your rule to measure the lengths of the three sides AB, BC and CD. Write your
values below, in cm, to 2 significant figures.
length of AB = ......................... cm
length of BC = ......................... cm
length of CD = ........................ cm [2]
(b) Write down the equation you would use to calculate the volume of the block. Do not
attempt a calculation.

[1]
(c) If you used your values from (a), what would be the unit for the volume of the block?
unit of volume = ........................... [1]

© UCLES 2006

0625/02/M/J/06

5
3

For
Examiner's
Use

Fig. 3.1(a) shows a measuring cylinder, containing some water, on a balance.
Fig. 3.1(b) shows the same arrangement with a stone added to the water.
measuring
cylinder

reading Q

reading P
water
stone

balance

reading S

reading R
(a)

(b)
Fig. 3.1

(a) Which two readings should be subtracted to give the volume of the stone?
reading ...................... and reading ...................... [1]
(b) Which two readings should be subtracted to give the mass of the stone?
reading ...................... and reading ...................... [1]
(c) In a certain experiment,
mass of stone = 57.5 g,
volume of stone = 25 cm3.
(i) Write down the equation linking density, mass and volume.

[1]
(ii) Calculate the density of the stone.

density of stone = ........................ [3]
© UCLES 2006

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6
4

For
Examiner's
Use

A piece of fruit is falling from a tree.

Fig. 4.1
(a) The list below contains the names of some different forms of energy.
Put a tick in the box alongside four that are possessed by the falling fruit.
chemical
electrical
gravitational (PE)
internal (thermal)
kinetic (KE)
light
sound
strain

[4]

(b) Which form of energy increases as the fruit falls?
....................................................................

[1]

(c) Which form of energy decreases as the fruit falls?
....................................................................

[1]

(d) Which form of energy is stored in the body of a person as a result of eating the fruit?
....................................................................
© UCLES 2006

0625/02/M/J/06

[1]

7
5

(a) State two changes that usually happen to the molecules of a solid when the solid is
heated.

For
Examiner's
Use

1. ......................................................................................................................................
2. ................................................................................................................................ [2]
(b) Most substances expand when they are heated.
(i) State one example where such expansion is useful.
............................................................................................................................ [1]
(ii) State one example where such expansion is a nuisance, and has to be allowed for.
............................................................................................................................ [1]

6

Fig. 6.1 shows a section through a series of waves on water.

Fig. 6.1
(a) On Fig. 6.1, carefully mark and label
(i) the wavelength of the waves,

[2]

(ii) the level of the flat, still water surface after the waves have passed.

[2]

(b) Describe how, using a stopwatch, the frequency of the waves could be found.
..........................................................................................................................................
..........................................................................................................................................
.................................................................................................................................... [2]

© UCLES 2006

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8
7

For
Examiner's
Use

(a) Fig. 7.1 shows a ray of blue light shining onto a glass prism.
screen
air
no

air

rm

al

of
ray ht
lig
blue

Fig. 7.1
With the aid of a straight edge, draw a possible path of the ray through the prism and
into the air until it reaches the screen.
[3]
(b) When a ray of white light passes through the prism, it spreads into a spectrum of
colours that can be seen on the screen.
(i) What is the name of this spreading effect? Tick one box.
convergence
diffraction
dispersion
reflection

[1]

(ii) Which colour is deviated least by the prism? ..................................................... [1]
(iii) Which colour is deviated most by the prism? ..................................................... [1]

© UCLES 2006

0625/02/M/J/06

9
8

For
Examiner's
Use

(a) State what is meant by the north pole of a magnet.
..........................................................................................................................................
.................................................................................................................................... [2]
(b) The north poles of two magnets are brought close together.
What sort of force, if any, is there between the poles? Tick one box.
attractive
repulsive
no force

[1]

(c) Fig. 8.1 shows the north pole of a magnet close to an iron bar.

magnet

N
iron
bar

Fig. 8.1
(i) The iron bar is attracted to the north pole because of induced magnetism in the
iron bar.
On Fig. 8.1, mark clearly the induced north pole and the induced south pole of the
iron bar.
[1]
(ii) State what happens to the induced magnetism in the iron bar when the magnet is
taken away.
............................................................................................................................ [1]

© UCLES 2006

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10
9

(a) The table below gives the half-lives of three radioactive substances.

substance

half-life

iodine-128

25 minutes

radon-222

3.8 days

strontium-90

28 years

Samples of each of the three substances have the same activity today. Which sample
will have the greatest activity in 1 year’s time? Explain your answer.
substance with greatest activity after 1 year ....................................................................
explanation ......................................................................................................................
.................................................................................................................................... [2]
(b) In 1986, an explosion at the Chernobyl nuclear power station released radioactive
substances into the air. One of the radioactive substances released was iodine-131.
Some of the iodine-131 found its way into cow’s milk.
The activity of a sample of this contaminated milk was measured each week for 4 weeks.
The results are shown below.
time / days
activity
–––––––
counts / s

© UCLES 2006

0

7

14

21

28

1000

547

294

162

88

0625/02/M/J/06

For
Examiner's
Use

11

For
Examiner's
Use

(i) On Fig. 9.1, plot the values given in the table.
1000

800
activity
_______
counts / s
600

400

200

0
0

5

10

15

20

25
time / days

30

Fig. 9.1
(ii) Draw the best-fit curve through your points.
(iii) Use your graph to find the half-life of iodine-131, showing clearly on your graph
how you obtained your value.
half-life of iodine-131 = ....................... days
[6]

© UCLES 2006

0625/02/M/J/06

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12

For
Examiner's
Use

10 (a) Fig. 10.1 shows a type of tube in which cathode rays can be produced.
fluorescent
screen

anode

filament

A
B

C

D
Fig. 10.1
(i) A p.d. is connected between two terminals in order to cause thermionic emission.
Between which two of the four labelled terminals is the p.d. connected?
between point .................. and point .................... [1]
(ii) Where does the thermionic emission occur?
............................................................................................................................ [1]
(iii) What particles are emitted during thermionic emission? Tick one box.
-particles
electrons
neutrons
protons

[1]

(iv) On Fig. 10.1, draw the path of the cathode rays that are created when all the
electrical connections are correctly made.
[1]
(v) State what is seen when the cathode rays strike the fluorescent screen.
............................................................................................................................ [1]

© UCLES 2006

0625/02/M/J/06

13
(b) Fig. 10.2 shows the same tube as in Fig. 10.1, with two metal plates alongside the tube.
A high p.d. is connected between the plates.

For
Examiner's
Use

+V

–V
Fig. 10.2
On Fig. 10.2, draw the path of the cathode rays.

[3]

(c) The tube in Fig. 10.1 and Fig. 10.2 has a vacuum inside it.
State why this vacuum is necessary.
..........................................................................................................................................
.................................................................................................................................... [1]

© UCLES 2006

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14

For
Examiner's
Use

11 Fig. 11.1 illustrates part of the journey of a car.

1000 m

500 m
start
of
town

end
of
town

oil drops
on road

1500 m
pylon

tree

Fig. 11.1
The car engine is leaking oil. Regularly, every 2.5 s, a drop of oil hits the road.
(a) The car is driven at a steady speed of 10 m/s through the town.
(i) Calculate the distance on the road between one oil drop and the next oil drop.

distance between oil drops = ................... m [2]
(ii) The town is 500 m across. Show that it takes the car 50 s to travel through the
town.

[3]
(b) At a distance of 1000 m outside the town, the car passes a tree. At a further distance of
1500 m, the car passes a pylon. Between the tree and the pylon the oil drops are all
75 m apart.
Calculate the speed of the car between the tree and the pylon.

speed of car = ................ m/s [2]

© UCLES 2006

0625/02/M/J/06

15

For
Examiner's
Use

(c) What has happened to the car between the end of the town and the tree?
Tick one box.
The car has accelerated.
The car has decelerated.
The car has travelled at constant speed.

[1]

(d) Each of the three parts of the journey takes 50 s.
Calculate the average speed of the car for the whole journey between the beginning of
the town and the pylon.

average speed = ................ m/s [5]

© UCLES 2006

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16
12 In the boxes of the left column below are some electrical hazards. In the boxes of the right
column are means of protecting against those hazards.
From each hazard, draw a line to the appropriate protection. One line has been drawn as an
example.
electrical hazard

means of protection

loose live wire touches
metal case of appliance

fuse or circuit-breaker
in the circuit

worn insulation on cable
to an appliance

use of switches with
a nylon pull-cord

steam in a washroom
condenses inside a switch

earth wire connected to the
metal case of the appliance

wires get hot because
current is too high

visual check of cables
before connecting appliance
[3]

reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been
included, the publisher will be pleased to make amends at the earliest possible opportunity.
University of Cambridge International Examinations is part of the University of Cambridge Local Examinations Syndicate (UCLES), which is itself a
department of the University of Cambridge.

© UCLES 2006

0625/02/M/J/06

For
Examiner's
Use

Centre Number

Candidate Number

Name


0625/02

PHYSICS
Paper 2

May/June 2005
1 hour 15 minutes

Write in dark blue or black pen in the spaces provided on the Question Paper.

If you have been given a label, look at the
details. If any details are incorrect or
missing, please fill in your correct details
in the space given at the top of this page.
Stick your personal label here, if
provided.

This document consists of 16 printed pages.
SPA (MML 8112 3/04) S80361/3
© UCLES 2005

[Turn over

2
1

For
Examiner's
Use

(a) A measuring cylinder contains 100 cm3 of water. 20 cm3 of the water is poured into a
beaker.
On Fig. 1.1, mark the level of the water left in the cylinder.

[2]

cm3
100

50

Fig. 1.1
(b) A rule, calibrated in cm, is placed alongside the measuring cylinder, as shown in Fig. 1.2.
cm3
15

100

10
50
5

Fig. 1.2
(i) What is the length of the measuring cylinder, from zero up to the 100 cm3 mark?
..................................................................................................................................
(ii) The volume of a cylinder is found using the equation
volume = cross-sectional area × length.
Calculate the cross-sectional area of the measuring cylinder.

cross-sectional area = .................................
[5]
© UCLES 2005

0625/02/M/J/05

3
2

A boat sails along a river, stopping at various places along the way. Fig. 2.1 shows how the
speed of the boat changes during the day, starting at 0900 hrs and reaching its final
destination at 2100 hrs.

For
Examiner's
Use

speed

0
0900

1100

1300

1500

1700
1900
2100
time of day (24 -hour clock)

Fig. 2.1
(a) Calculate how long the whole journey takes.

time taken = ....................... hours [2]
(b) State the time of day at which the boat reaches its greatest speed.
time of day = ................................. [1]
(c) State the longest time for which the boat was stationary at one place.
longest time = ....................... hours [1]
(d) If the speed axis had values marked on it, state
(i) how the graph could be used to find the distance travelled between 0900 hrs and
1130 hrs,
..................................................................................................................................
..................................................................................................................................
(ii) how the average speed for the whole journey could be found.
..................................................................................................................................

© UCLES 2005

..................................................................................................................................
[3]
[Turn over
0625/02/M/J/05

4
3

(a) A light vertical triangular piece of rigid plastic PQR is pivoted at corner P.
A horizontal 5 N force acts at Q, as shown in Fig. 3.1.
Q
5N
P
pivot
R
Fig. 3.1
Describe what, if anything, will happen to the piece of plastic.
..........................................................................................................................................
.................................................................................................................................... [2]
(b) On another occasion, two horizontal 5 N forces act on the piece of plastic, as shown in
Fig. 3.2.
Q
5N
P
pivot
R

5N

Fig. 3.2
(i)

Describe what, if anything, will happen to the piece of plastic.
..................................................................................................................................

(ii)

© UCLES 2005

On Fig. 3.2, mark the force that the pivot exerts on the piece of plastic. Show the
direction of the force by means of an arrow and write the magnitude of the force
next to the arrow.
[4]

0625/02/M/J/05

For
Examiner's
Use

5
4

For
Examiner's
Use

Fig. 4.1 represents a hydroelectric system for generating electricity.

reservoir
power
station

water flows down

water flows out

Fig. 4.1
Answer the following questions, using words from this list.
chemical
kinetic

electrical
light

gravitational
nuclear

sound

internal (heat)
strain

(a) What sort of energy, possessed by the water in the reservoir, is the main source of
energy for this system?
.................................................................................................................................... [1]
(b) When the water flows down the pipe, it is moving. What sort of energy does it possess
because of this movement?
.................................................................................................................................... [1]
(c) The water makes the turbines in the power station rotate. What sort of energy do the
turbines possess because of their rotation?
.................................................................................................................................... [1]
(d) What sort of energy does the power station generate?
.................................................................................................................................... [1]
(e) None of the energy transfer processes is perfect. In what form is most of the wasted
energy released?
.................................................................................................................................... [1]

© UCLES 2005

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6
5

(a) On a hot day, a child drinks all the water in a plastic bottle. She then screws the cap
back tightly on the bottle, so that the bottle contains only air.
cap screwed on tightly

air

Fig. 5.1
She throws the bottle into a waste basket, where the Sun shines on it.
After a while in the Sun’s rays, the air in the bottle is much hotter than before.
(i) State what has happened to the pressure of the air in the bottle.
..................................................................................................................................
(ii) In terms of the behaviour of the air molecules, explain your answer to (a)(i).
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
[5]

© UCLES 2005

0625/02/M/J/05

For
Examiner's
Use

7
(b) Also in the waste basket is a broken glass bottle containing a small quantity of water, as
shown in Fig. 5.2.

For
Examiner's
Use

water
Fig. 5.2
As the Sun shines on it, the volume of water slowly decreases.
(i) State the name of the process causing this decrease.
..................................................................................................................................
(ii) In terms of the effect of the Sun’s rays on the water molecules, explain your answer
to (b)(i).
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
[4]

© UCLES 2005

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8
6

The table below shows the potential difference (p.d.) needed at different times during a day
to cause a current of 0.03 A in a particular thermistor.
time of day (24-hour clock)

0900

1200

p.d. / V

15.0

9.9

resistance /

500

1500

1800
7.5

210

250

(a) Calculate the two values missing from the table. You may use the space below for your
working. Write your answers in the table.

[3]
(b) On Fig. 6.1, plot the four resistance values.
600
resistance /
400

200

0
0600

0900

1200

1500

1800

2100

time of day
Fig. 6.1
(c)

[2]

(i) Draw a smooth curve through your points.
(ii) Why do we draw a smooth curve rather than a series of straight lines joining the
points?
..................................................................................................................................
[2]

© UCLES 2005

0625/02/M/J/05

For
Examiner's
Use

9
(d) The thermistor is a circuit component with a resistance that decreases as the temperature
increases.

For
Examiner's
Use

(i) From your graph, estimate the time of day when the temperature was greatest.
time of day = .............................
(ii) State the reason for your answer to (d)(i).
..................................................................................................................................
..................................................................................................................................
[2]

© UCLES 2005

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10
7

For
Examiner's
Use

Fig. 7.1 shows the various regions of the electromagnetic spectrum.

radio

visible

Fig. 7.1
Two of the regions have been labelled.
(a) In the boxes provided, write the names of the other regions.

[4]

(b) Only one of the following types of wave is not an electromagnetic wave.
Tick one box to show which type of wave is not electromagnetic.
microwave
radar
sound

© UCLES 2005

[1]

0625/02/M/J/05

11
8

An inventor is trying to make a device to enable him to see objects behind him. He cuts a
square box in half diagonally and sticks two plane mirrors on the inside of the box.

For
Examiner's
Use

A side view of the arrangement is shown in Fig. 8.1.
mirror

box cut
in half
mirror
Fig. 8.1
Fig. 8.2 shows the arrangement, drawn larger.

ray 1 from object
ray 2 from object
45°

90°

Fig. 8.2
Fig. 8.2 shows parallel rays from two different points on a distant object behind the man.
(a) Carefully continue the two rays until they reach the place where the inventor’s head will
be.
[3]
(b) Look at what has happened to the two rays.
What can be said about the image the inventor sees?
.................................................................................................................................... [1]
© UCLES 2005

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12
9

The speed of sound in air is 332 m/s. A man stands 249 m from a large flat wall, as shown in
Fig. 9.1, and claps his hands once.

woman

man

249 m

249 m
Fig. 9.1

(a) Calculate the interval between the time when the man claps his hands and the time
when he hears the echo from the wall.

time interval = ........................... s [3]
(b) A woman is standing 249 m further away from the wall than the man. She hears the
clap twice, once directly and once after reflection from the wall.
How long after the man claps does she hear these two sounds? Tick two boxes.
0.75 s
1.50 s
2.25 s
3.00 s

© UCLES 2005

[2]

0625/02/M/J/05

For
Examiner's
Use

13
10 (a)

(i) What name do we give to the type of material that allows electrical charges to pass
through it?

For
Examiner's
Use

..................................................................................................................................
(ii) Give an example of such a material.
..................................................................................................................................
(iii) What must be done to this type of material in order to make electrical charges pass
through it?
..................................................................................................................................
..................................................................................................................................
[3]
(b)

(i) What name do we give to the type of material that does not allow electrical
charges to pass through it?
..................................................................................................................................
(ii) Give an example of such a material.
..................................................................................................................................
[2]

(c) Which of the two types of material in (a)(i) and (b)(i) may be held in the hand and
charged by friction (e.g. by rubbing with a soft cloth)?
.................................................................................................................................... [1]

© UCLES 2005

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14

For
Examiner's
Use

11 The circuit in Fig. 11.1 is connected up.

A
2Ω
resistance wire
Fig. 11.1
(a) How does the current in the resistance wire compare with the current in the 2
resistor? Tick one box.
smaller

same

greater

[1]

(b) A voltmeter connected across the resistance wire shows the same reading as a
voltmeter connected across the 2 resistor.
State the value of the resistance of the resistance wire.
........................................

[1]

(c) Calculate the combined resistance of the wire and the resistor.

combined resistance = ........................................

[2]

(d) The wire and resistor are disconnected and then reconnected in parallel, as shown in
Fig. 11.2.

A

resistance wire

2Ω
Fig. 11.2
© UCLES 2005

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15
(i) What is the combined resistance of the wire and resistor in Fig.11.2? Tick one box.

For
Examiner's
Use

zero
1
2
3
(ii) The ammeter in Fig. 11.1 reads 0.3 A. What is the reading on the ammeter in
Fig. 11.2? Tick one box.
zero
less than 0.3 A
0.3 A
more than 0.3 A
[2]
(e) Walls in buildings sometimes develop cracks. The width of a crack can be monitored by
measuring the resistance of a thin wire stretched across the crack and firmly fixed on
either side of the crack, as illustrated in Fig. 11.3.

thin wire

fixing pin
fixing pin
crack

Fig. 11.3
The wall moves and the crack widens slightly.
State what happens to
(i) the length of the wire, ...............................................................................................
(ii) the resistance of the wire. ........................................................................................
[2]
© UCLES 2005

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16
12 (a) Complete the following table about the particles in an atom. The first row has been filled
in as an example.
particle
proton

mass

charge

location

1 unit

+1 unit

For
Examiner's
Use

in the nucleus

neutron
electron
[6]
(b)

(i) Which of the particles in the table make up an -particle?
..................................................................................................................................
(ii) On the same scale as indicated by the table, state
1.

the mass of an -particle, .................................................................................

2.

the charge of an -particle. ...............................................................................
[3]

University of Cambridge International Examinations is part of the University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of
the University of Cambridge.

© UCLES 2005

0625/02/M/J/05

Centre Number

Candidate Number

Name


0625/02

PHYSICS
Paper 2

May/June 2004
1 hour 15 minutes

Write in dark blue or black pen in the spaces provided on the Question Paper.

If you have been given a label, look at the
details. If any details are incorrect or
missing, please fill in your correct details
in the space given at the top of this page.
Stick your personal label here, if
provided.

This document consists of 17 printed pages and 3 blank pages.
SPA (NH/BI) S61205/2
© UCLES 2004

[Turn over

2
1

The clock on a public building has a bell that strikes each hour so that people who cannot
see the clock can know what hour of the day it is.
At precisely 6 o’clock, the clock starts to strike. It strikes 6 times.
At the first strike of the bell, a man’s wrist-watch is as shown in Fig. 1.1.

11

12

1
2

10
9

3
8

4
7

6

5

Fig. 1.1
When the bell strikes for the sixth time, the wrist-watch is as shown in Fig. 1.2.

11

12

1
2

10
9

3
8

4
7

6

5

Fig. 1.2
(a) Calculate the time interval between the 1st strike and the 6th strike.

time interval = ……………… s [1]
(b) Calculate the time interval between one strike and the next.

time interval = ………………s [2]
(c) At precisely 11 o’clock, the clock starts to strike.
Calculate the time interval between the 1st strike and the 11th strike.

time interval = ………………s [2]
© UCLES 2004

0625/02 M/J/04

For
Examiner’s
Use

3
2

Fig. 2.1 shows a hinged rail in a fence. The rail has to be lifted vertically in order to let people
through.
hinge

For
Examiner’s
Use

rail

Fig. 2.1
(a) On Fig. 2.1, draw an arrow to show the position and direction of the smallest force that
would be needed to begin to raise the rail.
[3]
(b) What is the correct Physics term for the turning effect of a force?
Tick one box.
force
work
moment
movement

[1]

(c) Suggest one way the designer of the fence could have reduced the force needed to lift
the rail.
..........................................................................................................................................
......................................................................................................................................[1]

© UCLES 2004

0625/02 M/J/04

[Turn over

4
3

For
Examiner’s
Use

Fig. 3.1 shows the speed-time graph of part of a short journey made by a cyclist.
25
speed
m/s

20

P

Q

15
10
5
R

0
0

10

20

30

40

50

60

70

80

90

100

time/s
Fig. 3.1
(a) Which part of Fig. 3.1 shows when the cyclist is travelling at constant speed?
......................................................................................................................................[1]
(b) State what is happening during the rest of the journey shown in Fig. 3.1.
......................................................................................................................................[1]
(c) (i)

Calculate the distance travelled during the first 50 s.

distance travelled = …………………... m
(ii)

Calculate the distance travelled between 50 s and 100 s.

distance travelled = …………………... m

© UCLES 2004

0625/02 M/J/04

5
(iii)

For
Examiner’s
Use

Calculate the total distance travelled.

total distance travelled = …………………... m
(iv)

Calculate the average speed during the 100 s.

average speed = …………………... m/s
[8]

© UCLES 2004

0625/02 M/J/04

[Turn over

6
4

(a) Fig. 4.1 shows a person pulling a loaded barrow along a path from A to B at a steady
speed.

A

B
Fig. 4.1

State the two quantities you need to know in order to be able to calculate the work done
by the person.
1. ......................................................................................................................................
2. ..................................................................................................................................[2]
(b) Another person pulls an identical barrow and load from A to B, but this person pulls
much harder than the person in (a).
Describe what happens to the second person’s barrow.
..........................................................................................................................................
......................................................................................................................................[2]
(c) (i)

State which person has the greater power between A and B.
...................................................................................................................................

(ii)

Give two reasons for your answer to (c)(i).
reason 1 ....................................................................................................................
reason 2 ...................................................................................................................
[3]

© UCLES 2004

0625/02 M/J/04

For
Examiner’s
Use

7
5

Fig. 5.1 shows a shallow dish containing a liquid that evaporates easily. The bulb of a
thermometer is held in the liquid. A jet of air is blown over the surface of the liquid, so that the
liquid evaporates rapidly.

For
Examiner’s
Use

thermometer

jet of air

liquid
shallow dish

Fig. 5.1
(a) State what happens to the reading shown on the thermometer.
......................................................................................................................................[1]
(b) Explain your answer to (a) in terms of the behaviour of the molecules of the liquid.
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[2]
(c) State one example in everyday life where the effect demonstrated by this experiment
occurs.
......................................................................................................................................[1]

© UCLES 2004

0625/02 M/J/04

[Turn over

8
6

(a) When a certain amount of heat is supplied to 1 kg of insulated aluminium, the temperature
of the aluminium rises by 1 °C.

1 kg aluminium inside
a layer of insulation

heat supplied
to aluminium
Fig. 6.1
In what form does the aluminium store the energy that has been supplied?
......................................................................................................................................[1]
(b) The same amount of heat is supplied to 1 kg of insulated copper, as shown in Fig. 6.2.
1 kg copper inside
a layer of insulation

heat supplied
to copper
Fig. 6.2
The temperature rise of the 1 kg copper block is greater than the temperature rise of the
1 kg aluminium block in (a).
Explain, in terms of thermal capacity, why this is so.
..........................................................................................................................................
......................................................................................................................................[2]

© UCLES 2004

0625/02 M/J/04

For
Examiner’s
Use

9
7

For
Examiner’s
Use

Boy A throws a large stone into a large still pond, as illustrated in Fig. 7.1.

B
A

Fig. 7.1
Fig. 7.1
(a) Girl B hears the ‘plop’ sound of the stone entering the water a very short time after she
sees the splash, but it is many seconds before the water wave reaches the edge of the
pond where she is sitting.
Use this information to decide which wave travels fastest and which travels slowest.
Write ‘fastest’ in one box and ‘slowest’ in another box. Leave one box empty.
sound wave
light wave
water wave

[2]

(b) In the boxes below, state whether each type of wave is a transverse or a longitudinal
wave.
sound wave
light wave
water wave

[3]

(c) In the boxes below, put a tick alongside any of the types of wave that do not need a
substance in which to travel.
sound wave
light wave
water wave
© UCLES 2004

[1]
0625/02 M/J/04

[Turn over

10
8

A, B, C and D are an aluminium bar, an unmagnetised iron bar and two bar magnets. Tests
are performed to find out which bar is which.
Each row of Fig. 8.1 shows what happens when two of the bars are placed end to end.
A

B

repel

A

C

attract

B

D

no effect

Fig. 8.1
Which bar is which? Complete the lines below.
Bar A is ........................................................................
Bar B is ........................................................................
Bar C is ........................................................................
Bar D is ........................................................................

© UCLES 2004

0625/02 M/J/04

[4]

For
Examiner’s
Use

11
9

Some pond water becomes contaminated by the release of radioactive waste.
The radioactivity of a sample of the contaminated water is tested every week for 5 weeks.
The results are shown in the table below.

time/weeks

0

2

3

4

5

800

activity
count/s

1
440

240

130

70

For
Examiner’s
Use

40

(a) Plot these values on Fig. 9.1.

[3]

activity 800
count/s
700
600
500
400
300
200
100
0
0

1

2

3

4

5

6
time/weeks

Fig. 9.1
(b) Draw the best curve through your points.

[1]

(c) Use your graph to find the half-life of the radioactive material in the sample. Show clearly
on the graph how you obtained your answer.

half-life of radioactive material = ………………… weeks [2]
(d) If the sample of contaminated water used in the test had been smaller, state how this
would have affected, if at all,
(i)

the activity readings, .................................................................................................

(ii)

the value of the half-life. ............................................................................................
[2]

© UCLES 2004

0625/02 M/J/04

[Turn over

12
10 (a) One coil of a transformer is connected to a toy train set. The other coil is connected to a
240 V a.c. mains supply, as shown in Fig. 10.1.
240 V

primary coil
4800 turns

secondary coil
200 turns

to
train
set
Fig. 10.1
(i)

How can you tell from Fig. 10.1 that the transformer is a step-down transformer?
...................................................................................................................................
...............................................................................................................................[1]

(ii)

Calculate the voltage at which the toy train operates.

toy train operates at ………………… V [3]
(iii)

1.

The voltage of the mains supply is reduced. What happens to the voltage
supplied to the train set? Tick one box.
increases
decreases
stays the same

2.

An attempt is made to use the train set in a country where the mains supply is
110 V. Suggest one difference that might be noticed in the way the toy train
operates.
...........................................................................................................................
...........................................................................................................................
[2]

© UCLES 2004

0625/02 M/J/04

For
Examiner’s
Use

13

For
Examiner’s
Use

(b) Fig. 10.2 shows an electromagnetic relay being used to operate an electric motor.
pivoted iron
armature

power supply
for motor

M motor
switch
contacts
relay core
Fig. 10.2
Below are sentences that describe stages of the process by which the circuit works.
A

The armature pivots and the contacts close.

B

The core of the relay is magnetised.

C

The switch is closed and the current flows through the coil.

D

A current flows through the motor, making it work.

E

The core attracts the top part of the armature.

Put the sentences so that the stages are in the correct order. Put the appropriate letters
in the boxes below. One box has been filled in as an example.
Stage 1 is sentence

C

Stage 2 is sentence
Stage 3 is sentence
Stage 4 is sentence
Stage 5 is sentence

© UCLES 2004

[3]

0625/02 M/J/04

[Turn over

14
11 (a) The list below contains the names of five different components that might be found in an
electric circuit.
capacitor

light-dependent resistor

resistor

thermistor

variable resistor

Which of these has
(i)

a resistance that falls rapidly when the temperature rises,
...................................................................................................................................

(ii)

a resistance that changes when a sliding contact is moved,
...................................................................................................................................

(iii)

a high resistance in the dark but a low resistance in daylight?
...................................................................................................................................
[3]

(b) A lamp shines with full brightness when connected to a 12 V battery, as shown in
Fig. 11.1.

0.50 A

12 V

lamp
Fig. 11.1
(i)

1.

Write down the equation that links resistance with p.d. and current.

2.

The current in the lamp is 0.50 A. Calculate the resistance of the lamp.

resistance of lamp = …………………
[4]

© UCLES 2004

0625/02 M/J/04

For
Examiner’s
Use

15
(ii)

For
Examiner’s
Use

A resistor is now connected in series with the lamp, as shown in Fig. 11.2.

12 V

lamp
Fig. 11.2
1.

State what happens to the current in the lamp when the resistor is added.
...........................................................................................................................

2.

Explain your answer.
...........................................................................................................................
...........................................................................................................................

3.

Suggest what change might be seen in the lamp.
...........................................................................................................................
[3]

© UCLES 2004

0625/02 M/J/04

[Turn over

16
12 (a) A man looks at his reflection in a vertical mirror. This is shown from the side in Fig. 12.1.
mirror

A

Fig. 12.1
(i)

On Fig. 12.1, accurately mark with a clear dot labelled B where the image of the tip
A of the man’s beard will be.

(ii)

On Fig. 12.1, accurately draw a ray from the tip of the man’s beard that reflects from
the mirror and goes into his eye. You may use faint construction lines if you wish.
Use arrows to show the direction of the ray.

(iii)

The man can see the image, but it cannot be formed on a screen. What name is
given to this type of image?
...................................................................................................................................

(iv)

Write down the equation that links the angles of incidence and reflection that the
ray makes with the mirror.

[7]

© UCLES 2004

0625/02 M/J/04

For
Examiner’s
Use

17
(b) A girl looks into a bathroom mirror to brush her hair. Fig. 12.2 shows what she sees in
the mirror.

reflection seen
in mirror

Fig. 12.2
(i)

In which hand is she holding the brush? Tick one box.
left hand
right hand

(ii)

She has a spot on her skin just below her left eye.
Mark clearly on Fig. 12.2 where this will appear on the reflection.
[2]

© UCLES 2004

0625/02 M/J/04

For
Examiner’s
Use

20
BLANK PAGE

Copyright Acknowledgements:

Every reasonable effort has been made to trace all copyright holders. The publishers would be pleased to hear from anyone whose rights we have unwittingly
infringed.
University of Cambridge International Examinations is part of the University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of
the University of Cambridge.

0625/02 M/J/04

Summer paper 2 core

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