This document provides the marking scheme for a physics examination in the state of Pahang, Malaysia. It includes 4 sample exam questions and outlines the points and marks awarded for potential student answers. The first question involves sound waves and relationships between distance and amplitude. The second question is about friction and relationships between applied force and acceleration. The third question involves a gas laws experiment on relationships between pressure and volume. The fourth question examines relationships between wire diameter and resistance. For each question, the marking scheme identifies the key points that should be addressed to receive full or partial marks, such as stating hypotheses, describing methods and controls, presenting data in a table, and drawing graphs.

1. -1-
PEPERIKSAAN PERCUBAAN
SIJIL PELAJARAN MALAYSIA
2015
NEGERI PAHANG
PERATURAN PEMARKAHAN FIZIK
KERTAS 3
This booklet consists of 10 printed pages

2. -2-
#1 Answer Mark
1 (a) (i) Distance between 2 coherent sources of sound waves, a 1
(ii) Distance between two consecutive of loud sound, x 1
(iii)
Distance between loudspeakers and where sound is
detected // frequencsy of sound waves // wavelength of
sound waves
1
(b)
(i) a = 1.0 m x = 15.2 cm
a = 1.5 m x = 10.3 cm
a = 2.0 m x = 7.3 cm
a = 2.5 m x = 5.9 cm
a = 3.0 m x = 4.7 cm
a (m) (m-1
) x (cm) x (m)
1.0 1.00 15.2 3.04
1.5 0.67 10.3 2.06
2.0 0.50 7.3 1.46
2.5 0.40 5.9 1.18
3.0 0.33 4.7 0.94
.
Tabulate data
1. Shows a table which have a, and x.
2. State the correct unit (a : m, : m-1
and x : cm / m)
3. All values x are correct
4. Values of are consistent to 2 decimal point
5. Values of x are consistent to 2 decimal point
All correct 2M
4 correct 1M
3 correct 0M
(accept: ±0.1cm)
1
1
1
1
1 (7)
Accept if student chooses
to write either one

3. -3-
(c) Draw graphs x against
1. √ The responding variable, x at y axis
2. √ The manipulated variable, at x axis
3. √ States the unit of variable correctly
4 √ Both axis with the even and uniform scale
5. √ 5 points correctly plotted
6. √ A smooth best fit straight line
7. √ Minimum size (50% of graph paper)
Score :
Number of  Score
7 5
5 – 6 4
3 – 4 3
2 2
1 1
(refer to the next page : Graph 1 OR Graph 2)
5
(d) x is inversely proportional to a OR x is directly proportional
to
1
TOTAL MARKS 16

4. -4-
Graph 1

5. -5-
Graph 2

6. -6-
#2 Answer Mark
2 (a) Shows extrapolation on the graph, intercept y-axis
F = 7N
1
1
(b) i Frictional Force 1
ii a increased 1
(c) i Shows on the graph appropiate right triangle (>5x4)
Gradient, m = =
= 3.125 N ms-2
@ 3.125 kg
1
1
1
ii Marked on the graph
a = 2.3 ms-2
– 2.8 ms-2
1
1
iii F increases linearly with a 1
(d) Mass 1
(e) 1. The elastic strings are stretched at constant length.
2. The position of the eye perpendicular to the scale of the metre
rule when measuring the ticker tape to avoid parallax
error/systematic error.
1
TOTAL MARKS 12

7. -7-
# 3 Answer Marks
(a)
(b)
(c)
State a suitable inference
The size of the gas bubble depends on the depth of the water.
1
State a relevant hypothesis
The smaller the pressure, the larger is the volume of a (fixed)
mass of gas.
1
State the aim of experiment
To investigate the relationship between the pressure and volume
for a (fixed) mass of gas at a constant temperature.
1
State the suitable manipulated variable and responding
variable
Manipulated variable : Volume, V
Responding variable : Gas pressure, P
1
State the constant variable
Gas temperature,T // mass of gas, m
1
State the complete list of apparatus and materials
Glass syringe, a short rubber tube and Bourdon gauge 1
Draw the functional arrangement of the apparatus
1

8. -8-
State the method to control the manipulated variable
The piston of the syringe is adjusted until the volume of air in the
syringe is 100 cm3
at atmospheric pressure.
1
State the method to control the responding variable
The piston is then pushed in so that the volume of air trapped is
90 cm3
.
The pressure on the Bourdon gauge is recorded.
1
Repeat the experiment four times with values
Repeat the experiment for (enclosed) volume /air trapped in the
syringe 80cm3
, 70 cm3
and 60 cm3
.
1
State how the data tabulated with the title MV and RV
Volume, V/cm3
Pressure, P/Pa
100
90
80
70
60
1
Sketch a graph of H against u // M against u
1
TOTAL MARKS 12
Remarks:
Underline – must
In brackets – optional
P/Pa
V/cm3

9. -9-
# 4 Answer Marks
(a)
(b)
(c)
State a suitable inference
Resistance depends on // diameter of wire // thickness of wire //
cross-section area of wire
1
State a relevant hypothesis
The larger the diameter of the wire, the lower the resistance
(thickness // cross-section area)
1
State the aim of experiment
To investigate the relationship between the diameter of wire and
resistance of wire (thickness // cross-section area)
1
State the suitable manipulated variable and responding
variable
Manipulated variable : diameter of eureka wire
(thickness // cross-section area)
Responding variable : resistance of the wire
1
State the constant variable
Length of wire // temperature of wire // type of wire 1
State the complete list of apparatus and materials
Eureka wire (0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm), dry
cells, ammeter, voltmeter, rheostat, metre rule, press-switch,
connecting wire
1
Draw the functional arrangement of the apparatus
1
State the method to control the manipulated variable,
responding
Connect a eureka wire (0.1mm) across terminal X and Y.
1
Eureka Wire

10. -10-
State the method to control the responding variable
Close the switch, adjust the rheostat so that the current flow, I =
0.5 A. Record the voltmeter reading, V. Calculate resistance, R
using the formula R = V/I
1
Repeat the experiment at least 4 times with values
Repeat the experiment is repeated with eureka wire 0.2 mm,
0.3 mm, 0.4 mm and 0.5 mm.
1
State how the data tabulated with the title MV and RV
D / mm R/Ω
0.1
0.2
0.3
0.4
0.5
.
1
Sketch a graph of R against L
1
TOTAL MARKS 12
END OF MARKING SCHEME
D / mm