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P4 - ELECTRICAL QUANTITIES - REVISION

Total questions: 41

Worksheet time: 60secs

Name
Class
Date
1.

A current of 12 A flows for 20 minutes into an electric cooker.


How much charge has the cooker used?

a)

14400 C

b)

280 C

c)

100 C

d)

0.6 C

2.

What is the resistance in this circuit?

a)

0.05Ω

b)

1.8Ω

c)

20Ω

3.

What is the resistance of an object that draws 0.24 A when connected to a 120 volt circuit?

a)

0.024 ohms

b)

28.8 ohms

c)

124 ohms

d)

500 ohms

4.

What is the current drawn by a 10 ohm resistor when it is connected to a 12 V car battery?

a)

22 amperes

b)

1.2 amperes

c)

0.83 amperes

d)

120 amperes

5.
The total resistance in this circuit is 
a)
100 ohms
b)
450 ohms
c)
400 ohms
d)
30 ohms
6.
The current going through the 45 ohm resistor is 
a)
0.05 amps
b)
0.2 amps
c)
0.1 amps
d)
5 amps
7.
The total resistance of this circuit is 
a)
25.7 ohms
b)
315 ohms
c)
324 ohms
d)
90 ohms
8.
What is a benefit of using a parallel circuit?  
a)
It gets confusing.
b)
There are no problems.
c)
If one light goes out, it does not affect the others. 
d)
If one light goes out, they all go out. 
9.

Which physical quantity is the same for both R1 and R2 if they have different resistance?

a)

Current

b)

Potential difference

c)

Power

d)

Resistance

10.

What is the name of the Law that relates current, voltage and resistance in an electrical circuit?

a)

Ohm's Law

b)

Lenz's Law

c)

Faraday's Law

d)

Maxwell's Law

11.

This symbol represents a ..............

a)

valve

b)

voltmeter

c)

Voltage

d)

Vacuum

12.

This symbol represents a .............

a)

Anode

b)

Alternator

c)

Amplifier

d)

Ammeter

13.

This symbol represents a .........

a)

Resistor

b)

Battery

c)

Twix

d)

buzzer

14.

This symbol represents a ...........

a)

A snapped wire

b)

Electrical junction

c)

Switch

d)

L.E.D.

15.

What is the resistance of an object that draws 0.24 A when connected to a 120 volt circuit?

a)

0.024 ohms

b)

28.8 ohms

c)

124 ohms

d)

500 ohms

16.

Current is defined as...

a)

work done per unit charge

b)

rate of flow of charge

c)

opposition to flow of charge

d)

work done by energy source on external circuit

17.

The unit of current is the ...

a)

ohm

b)

volt

c)

coulomb

d)

ampere

18.

p.d. is measured using ....

a)

an ohmeter

b)

a voltmeter

c)

an ammeter

d)

a coulombmeter

19.

Ammeters should be connected ...

a)

in parallel

b)

in series

c)

in line

d)

from + to -

20.

Which of the following is correct?

a)

R = IV

b)

R = I/V

c)

I = R/V

d)

V = IR

21.
.
a)
A
b)
B
c)
C
d)
D
22.
.
a)
A
b)
B
c)
C
d)
D
23.
.
a)
A
b)
B
c)
C
d)
D
24.
.
a)
A
b)
B
c)
C
d)
D
25.

A resistor converts 350J of electrical energy to other forms of energy. What is the amount of charge that flows through it when a p.d. of 7V is applied across it?

a)

0.20 C

b)

50 C

c)

350 C

d)

2450 C

26.

A 30 Ω resistor is connected in series with another resistor and a 6.0V battery. The current in the circuit is 0.12 A. A voltmeter is connected across the other resistor. What is the reading on the voltmeter?

a)

6.0V

b)

9.6V

c)

2.4V

d)

3.6V

27.

A small potential difference V is applied across a filament lamp. The current I in the lamp is measured. V is increased in stages and I is measured at each stage.

Which graph shows the results obtained?

a)
b)
c)
d)
28.

In the circuit shown, the ammeter reads 2.0 A and the voltmeter reads 12 V. How much energy is transferred by the resistor in 10 seconds?

a)

1440J

b)

240J

c)

14.4J

d)

2.4J

29.

A resistor of resistance R is connected to a battery of e.m.f. V.

There is a current I in the resistor.

Power P is dissipated by the resistor, and in time t the energy transferred is E. Which expression is correct?

a)

P=VIR

b)

E=IVt

c)

E=PIt

d)

P=V/R

30.

The current in a lamp is 0.2 A. If the lamp is switched on for 2 hours then the total electric charge passing through the lamp is (a)   C.

31.
.
a)
A
b)
B
c)
C
d)
D
32.
.
a)
A
b)
B
c)
C
d)
D
33.
.
a)
A
b)
B
c)
C
d)
D
34.
.
a)
A
b)
B
c)
C
d)
D
35.
.
a)
A
b)
B
c)
C
d)
D
36.
.
a)
A
b)
B
c)
C
d)
D
37.
.
a)
A
b)
B
c)
C
d)
D
38.
.
a)
A
b)
B
c)
C
d)
D
39.
.
a)
A
b)
B
c)
C
d)
D
40.
.
a)
A
b)
B
c)
C
d)
D
41.
.
a)
A
b)
B
c)
C
d)
D

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