1. ·.~'
~
,
~(J
..
(ii)
-
Find the resistance of the lamp when the current flowing is 0.:20 A
I:
.
(
.
'
..
'
' .
:'
"
..
)
,
.
(
.
e

2. Cl
Y>
uit is 0.20 A, determine the total potential difference across
(2 marks)
AQ the lamp and resistance wire .
?
fr:: (H
Oh
i)
Th
e
la ................................................................................................................................. - ............................................................
m .
p, (
res
ist 2
an
ce m
wi a
re r
an k
da s
bat
)
ter
y
are
no T
w o
co t
a
nn l
ect
ed 1
in 6
ser
ie. m
s. a
I r
f k
s
t
h
e
c
u END OFTEST
r
r
e
n
t
i
n
t
h
e
c
i
r
c

3. I I"~ ,

4. ~QI ~
~
r
i!
'.
~
'
1:
}.
~ (ii)
~
I
"; ~',
~.i :~
L'~
;}
?iJ
. .','
,
.::t
20.a:
.
.•.•.
~:'~
"•
(iii)
:~~
~'-
...•
. ',
'
'i!
i
~~<,
.
t~.
~.
':'"
.)
,
,
.
'::.
~
"
i
~
~ -r..'
.~
~
"/~
~
~
';1
i
~:'
~
,:·
l
,-:,
~
'·A
~
'1<
i
,:~
'l
.~~
.
~
t
~
~'$
'!
:
~
::
}
:;
~
:
~,:
Z':;
-'J.
,.
t
,~:
':"
.~

5. gs change when the
_
•
•
•
sliding contact on the rheostat is moved from end X to the other e rd Y .
&
0
-9-
•
•
•
•
•
•
(You may use the space below the table for your calculations.)
•
•
•
•
E
•
•
•
•
x
•
•
•
•
p
~
•
•
•
Rheostat setting Resistance of Ammeter '/oltmctcr
l
•
•
•
whole circuit/O reading/A reading/V
•
a
•
•
•
•
i
•
•
•
•
X
•
n
•
•
•
•
•
•
•
•
w Y
•
•
•
•
•
h
•
,,-,--,
•
•
•
y
•
•
•
Table 2
•
•
•
•
( 5 marks)
~
i
•
•
•
•
t
•
_
•
•
•
•
•
i
•
•
•
•
•
s
•
•
•
•
•
•
•
•
n
•
•
_
•
e
•
•
•
•
c
•
•
•
•
e
•
•
•
•
•
s
•
•
•
•
s
•
•
•
•
a
•
•
•
•
•
r
•
•
•
•
y
•
•
•
•
•
( I ma
f
o C
r o
m
t p
h l
e e
t
v e
o
l T
t a
m b
e l
t e
e
r 2
,
t
o
b 10
e GO ON TO THF NFXT PAir':;'
l
h o
a w
v ,
e
t
a o
h s
i h
g o
h w
r h
e o
s w
i
s t
t h
a e
n
c m
e e
. t
e
r
r
e
a
d
•
•
•
i
n
•
•
•
•
•
•
•
•

7. - 6 -
(c) (i) A fluorescent lamp is rated at lSW, l20Y. Calculate the current which the lamp
draws from the main supply.
( 3 marks)
(ii) Calculate the resistance of this lamp while it is lit.
( 3 marks)
. l-,I
; t iii :
..
.
~ Whe
.
n the
lamp
is lit,
4W
of
';
f
I~
the
energ
y
suppl
ied is
lost
as
heat.
- Calc
',
,
. ulate
-
the
"
effici

8. e (
Total 15
GO ON TO THE
o

9. 5. P, Q and R represent blocks of copper mounted on insulating stands. At the start of an experiment, Pis
given some positive charges, but Q and R are left electrically neutral.
When R is momentarily earthed on the side furthest from P, what are the charges on Q and R respectively?
(2)
6 Calculate the power of an electric fire that draws a current of 8A from a 230V power supply.
(2)
7. What is the purpose of a fuse?
(1
)
8. Calculate the cost of running a 2kW device for 5 hours if units of electricity cost $ 8 each.
(3)
9. What is the difference between alternating and direct current?
(1)

10. 21.
23.
22.
~
.""" .~~:"J, ti'Y""_-,,

11. ..
24. In the space provided draw the accepted electrical
circuit s~nbol for each of the following components of A
a simple circuit.
(a) a wire crossing, but not connected to another wire
(b) a lamp
Ic) a fuse
(d) an open switch
(e) a resistor (fixed)
(f) an ammeter
25. Study the circuits below. The switch S is open. In
which circuit would lamp P not light but lamps Q and R
would?

12. A
'LU
A S c
J
o

13. R1(O) R2(O Physics Worksheet ,- Series & Parallel
R3( Resistance ac
) Q)
.- Camperdowr. High School
,
S 6 6
N~e: ___________~----_---------- ____ ( ) Date:
15 15 5
Class: .-~
10 10 5
--.-----.--------
5
20 10
20. State the difference between a series connection and a parallel connection (note: NOT
3 9 18 -~--
1
circuitl), Draw diagrams to illustrate the difference .
.~-- .. -----
10 I
I
15
i
3
---'---"'-.-'-'-
10 15 6
., -- --~--- --.--.--
21. Four resistors are connected in ."~I:L"i, ~s,hu'11j. If .1 current of 0.2. A is shown on the
-0 ~
ammeter, find: .
I 50 J-:i 100 t-rf 20 ~ 40 ~
22. the p.d. across each of the resistors:
50: 100: _____ :c. Q; 4Q: ______
-----
23. the resistance between J and N;
24. the p.d. between J and N:
25. the resistance between K and
N:
e. . the p.d. between K and N:
26. the resistance between J and M:
27. the p.d. between J and M:
28. Three resistors are connected in parallel, as shown. Fill in
the table below with the correct resistance values:

14. 26.
28.
27.
29.
..... ".-
ross Xy ny

15. 30. In the space provided draw the accepted electrical
circuit symbol for each of the following components of
a simple circuit.
la) a wire crossing, but not connected to another wire
(b) a lamp
(c) a fuse
(d) an open switch
(e) a resistor (fixed)
(f) an ammeter
31. Study the circuits below. The switch S is open. In
which circuit would lamp P not light but lamps Q and R
would?
A 5
"LU
A 5 5