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Science -WA 3 Revision on Electricity

Total questions: 64

Worksheet time: 1hrs 23mins

Name
Class
Date
1.

What is this symbol?

a)

Cell

b)

Switch

c)

Bulb

d)

2 cell battery

2.

What is this symbol?

a)

Cell

b)

Switch

c)

Bulb

d)

Resistor

3.

What is this symbol?

a)

Cell

b)

Fuse

c)

Bulb

d)

Resistor

4.

What is this symbol?

a)

Switch

b)

Fuse

c)

Bulb

d)

Resistor

5.

What is this symbol?

a)

Switch

b)

Fuse

c)

Variable resistor

d)

Resistor

6.

What is this symbol?

a)

Switch

b)

Fuse

c)

Bulb

d)

Buzzer

7.

What is this symbol?

a)

Switch

b)

Fuse

c)

Bulb

d)

2 cell battery

8.

If the switch is open in a circuit, then...

a)

...electricity will flow.

b)

....electricity will NOT flow.

9.

This switch is open.

a)

True

b)

False

10.

What is the measuring device shown?

a)

bulb

b)

cell

c)

ammeter

d)

voltmeter

11.

What can you say about the current in the series circuit?

a)

it splits across the components

b)

it changes constantly

c)

it is different in different places

d)

it is the same everywhere

12.

If the ammeter says the current is 5A, what is the current flowing through one bulb?

a)

2.5A

b)

10A

c)

5A

d)

0

13.

If one bulb was broken, what would happen?

a)

current would no longer flow, so everything would be off

b)

the ammeter would measure a current from the other bulb

c)

the switch would keep the current flowing

d)

the cell would burn out and catch fire

14.

Name the charged particle, which is part of an atom, that flows in a circuit

a)

proton

b)

electron

c)

neutron

d)

elepton

15.
A series circuit has how many pathways for the electrons to flow?
a)
Two
b)
One
c)
Many
d)
Zero
16.
Which circuit is pictured below?
a)
Parallel
b)
Incomplete
c)
Series
17.

__________ remains the same in a series circuit.

a)

Resistance

b)

Voltage

c)

Current

d)

Power

18.
As resistors are added in series to a circuit, the total resistance will...
a)
increase
b)
decrease
c)
stay the same
19.
As the resistance of a circuit increases, the current will...
a)
increase
b)
decrease
c)
stay the same
20.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
21.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
22.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
23.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
24.

A material in which electrons are not able to move easily is a(n)

a)

Circuit

b)

Insulator

c)

Resistance

d)

Conductor

25.
Voltage is simply defined as...
a)
what 'pushes' electrons
b)
what 'stops' electrons
c)
moving electrons
26.

Conventionally, current is described as flowing from the ................ terminal of a battery to the ................ terminal.

a)

Negative.....negative

b)

Negative....positive

c)

Positive......negative

d)

Positive....positive

27.

SI unit of current is

a)

ampere

b)

metre

c)

ohm

d)

volt

28.

SI unit of voltage is

a)

ampere

b)

metre

c)

ohm

d)

volt

29.

Voltage can be measured using ............

a)

ammeter

b)

light bulb

c)

resistor

d)

voltmeter

30.

An ammeter is connected in ...........

a)

Parallel

b)

Series

31.

A voltmeter is connected in ...........

a)

Parallel

b)

Series

32.

This is the symbol for

a)

ammeter

b)

light bulb

c)

resistor

d)

voltmeter

33.

What is needed for current to flow?

a)

light bulb

b)

multimeter

c)

resistance

d)

voltage

34.

SI unit of resistance is

a)

ampere

b)

metre

c)

ohm

d)

volt

35.

Effective resistance increases when in .............. circuit.

a)

Parallel

b)

Series

36.

Effective resistance decreases when in .............. circuit.

a)

Parallel

b)

Series

37.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
38.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
39.
Current times Resistance equals
 (I X R)
a)
Power
b)
Voltage
c)
Amperage
d)
Ohm
40.
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
41.

Voltage divided by Resistance

(V / R)

a)

Current

b)

Power

c)

Ohms

d)

Watts

42.

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.

a)

60Ω

b)

120Ω

c)

180Ω

d)

240Ω

43.

Speakers need a household voltage of 110 V to push a current of 5.5 A through them. What is the

resistance of the speakers?

a)

10Ω

b)

20Ω

c)

30Ω

d)

40Ω

44.

An IPod uses a standard 1.5 V battery. How much resistance is in the circuit if it uses a current of 0.01A?

a)

50Ω

b)

100Ω

c)

150Ω

d)

200Ω

45.

A circuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current.

a)

0.5A

b)

1A

c)

1.5A

d)

2A

46.

A light bulb has a resistance of 5 ohms and a maximum current of 10 A. How much voltage can be applied

before the bulb will break?

a)

5V

b)

10V

c)

25V

d)

50V

47.
The total resistance in this circuit is 
a)
100 ohms
b)
450 ohms
c)
400 ohms
d)
30 ohms
48.

In a series circuit...

a)

the current is the same everywhere.

b)

the current is split between components.

c)

the voltage is the same everywhere.

d)

the voltage is split between components.

49.

Ammeters should always be connected in (a)   .

50.

What is the reading on the labelled ammeter?

(a)  

51.

What is the reading on the labelled ammeter?

(a)  

52.

Voltmeters should always be connected in (a)   around a component.

53.

An electrical fault could result in:

  • Click the boxes with the correct answers
a)

Fire

b)

Loss of business

c)

Strips

d)

Electrical shock

54.

What colour is the live wire in a three pin plug?

a)

brown

b)

Blue

c)

Green and yellow

55.

What colour is the neutral wire in a three pin plug

a)

brown

b)

Blue

c)

Green and yellow

56.

What colour is the earth wire in a three pin plug

a)

brown

b)

Blue

c)

Green and yellow

57.

Which label points protect the wires and electrical appliances form any excessive current flow?

a)

C

b)

D

c)

E

d)

F

58.

Which label points carries current into electrical appliance ?

a)

A

b)

B

c)

C

d)

D

59.

Which label points allow leaked electrical current to flow in earth?

a)

A

b)

B

c)

C

d)

D

60.

Which label points to the Neutral Wire on the diagram?

a)

A

b)

B

c)

C

d)

D

61.

Which label points to the Fuse on the diagram?

(a)  

62.

When the current through a fuse gets too high, the wire inside the fuse will...

a)

spark

b)

melt

c)

switch OFF

63.

The ___________ wire is a safety wire to stop the appliance becoming live.

a)

earth

b)

live

c)

neutral

d)

safe

64.

The earth wire only carries a current when there is a __________ in the appliance.

a)

fire

b)

fault

c)

large electric current

d)

insulation

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