Grade 10
PHYSICAL SCIENCES
Control Test - Suggested Solution
QUESTION 1
1.1
D 
(2)
1.2
B 
(2)
1.3
A 
(2)
[6]
QUESTION 2
2.1
False 
They are said to be connected in parallel.
(2)
2.2
False 
Volt.coulomb
(2)
[4]
QUESTION 3
3.1
Fewer 
(1)
3.2
Current 
(1)
3.3
Voltmeter 
(1)
1
[3]
QUESTION 4
4.1
(1)
4.2
Ic = 0,6 A 
4.3
Q = It
(1)
= (0,6 A)(120 s) 
= 72 C 
(3)
4.4
(1)
4.5
4.6
VCD = 1,2 V 
The resistances of the light bulbs are different. 
(2)
Bulb 2 burns dimmer  because the potential difference is lower. 
(2)
2
[10]
QUESTION 5
5.1
V =
=
W

Q
90

20
= 4,5 V 
5.2
One cell =
(4)
4,5

3
= 1,5 V
5.3
I =
=
(2)
Q

t
30

40
= 0,75 A 
5.4
5.5
I =
(4)
0,75

3
= 0,25 A 
(2)
Shine dimmer 
(1)
3
[13]
QUESTION 6
6.1
Q = It
= (1,5 A)(10 s) 
= 15 C 
6.2
(3)
V
I
3

=
1,5
R =
= 2Ω
(3)
6.3
Potential 
6.4
You can subtract the value of R1 from the total resistance of the circuit to
obtain the reading on R2 
(1)
R2 = 2 Ω – 1,33 Ω = 0,67 Ω 
6.5
(2)
Q = It
= (1,5 A)(5 min)(60 s) = 450 C 
V2 = IR2
= (1,5 A)(0,67 Ω) = 1 V 
W = VQ
= (1 V)(450 C)  = 450 J 
(5)
[TOTAL: 50 marks]
4
[14]