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Electrical Science Revision Session

Total questions: 35

Worksheet time: 35mins

Name
Class
Date
1.

If you have a resistor with a value of 5ohms and a supply voltage of 120v, what current would flow?

a)

600 amps

b)

24 ohms

c)

60 amps

d)

24 amps

2.

A piece of equipment uses 480 watts with a supply of 240v, what current is the equipment drawing?

a)

2 amps

b)

115,200 amps

c)

2 watts

d)

0.2 amps

3.

What does this electrical symbol show?

a)

Switch

b)

Sound bar

c)

Fluorescent Light

d)

Fuse

4.

What is the SI unit for Frequency?

a)

Watts

b)

Joules

c)

Energy

d)

Hertz

5.

You have three resistors in series of values of 5 ohms, 7 ohms and 8 ohms, what is the total resistance?

a)

20 amps

b)

18 ohms

c)

20 ohms

d)

22 ohms

6.

What is the SI unit for Power?

a)

Volts

b)

Hertz

c)

Watts

d)

Ohms

7.

What is a good source of producing Direct Current?

a)

A generator

b)

A light

c)

Battery

d)

MCB

8.

Two resistors in a series circuit, the total resistance is 40 ohms. One of the resistors is 10 ohms, what is the other?

a)

20 ohms

b)

50 ohms

c)

30 ohms

d)

5 ohms

9.

What is a good source of producing Alternating Current?

a)

Battery

b)

Drill

c)

Generator

d)

RCD

10.

What kind of appliance needs its own circuit?

a)

Steam Iron

b)

Dishwasher

c)

Electric Shower

d)

Gas Fireplace

11.

What is the SI unit for Resistance?

a)

Kelvin

b)

Hertz

c)

Amps

d)

Ohms

12.

What does this electrical symbol show?

a)

Switch

b)

Light

c)

Fuse

d)

Resistor

13.

What is the SI unit for Temperature?

a)

Ohms

b)

Kelvins

c)

Watts

d)

Tesla

14.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
15.

What is the value 3.25Mw in watts?

a)

3,250 watts

b)

325,000 watts

c)

0.0325 watts

d)

3,250,000 watts

16.

What does this electrical symbol show?

a)

Single Socket Outlet

b)

Double Socket Outlet

c)

Single Switched Socket Outlet

d)

Double Switched Socket Outlet

17.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
18.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
19.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
20.

Convert 4Ma into amps.

a)

4000 amps

b)

4000000 amps

c)

4000 volts

d)

40000 amps

21.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
22.
If the Voltage stays the same and Resistance is increased, Current will 
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
23.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
24.
Identify the insulator below.
a)
aluminum foil
b)
paperclip
c)
rubber eraser
25.

If each resistor is 3 ohms, what is the RT?

a)

3 ohms

b)

1 ohms

c)

6 ohms

d)

9 ohms

26.

What is the resistance of a lightbulb that experiences 9 Volts and 3 amps of current?

a)

1/3 ohms

b)

3 ohms

c)

27 ohms

d)

9 ohms

27.

What is 5.5kA in amps?

a)

550 amps

b)

5,500 volts

c)

55 amps

d)

5,500 amps

28.

What type of circuit is this?

a)

Series circuit

b)

Kilowatt circuit

c)

Parallel circuit

d)

potential circuit

29.

An electric current is the flow of ..............in a circuit?

a)

Protons

b)

Electrons

c)

Maltesers

d)

bulbs

30.

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

a)

bulb

b)

wire

c)

cell

d)

resistor

31.
Which is NOT an insulator.
a)
Wool
b)
Plastic
c)
Copper
d)
Glass
32.

Convert 1250mV to volts.

a)

1250 volts

b)

1.25 volts

c)

125 volts

d)

12.5 volts

33.
What is a example of a conductor?
a)
wood 
b)
metal
c)
rubber
d)
rock
34.

What are some examples of insulators?

a)

silver, iron, cooper

b)

metal spoon, penny, aluminum

c)

rubber, glass, wood

d)

gold, wire, nails

35.

Convert 8.5Mw to watts

a)

8,500 watts

b)

8,500,000 watts

c)

85,000 watts

d)

850,000 watts

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