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Year 9 Revision - Physics

Total questions: 66

Worksheet time: 59mins

Name
Class
Date
1.
Which is NOT an insulator.
a)
Wool
b)
Plastic
c)
Copper
d)
Glass
2.
What is the difference between a conductor and an insulator?
a)
An insulator allows electricity to flow through it easily and a conductor does not
b)
A conductor allows electricity to flow through it easily and an insulator does not.
c)
An insulator is magnetic and a conductor is not
d)
A conductor is magnetic and an insulator is not
3.

Fill in the blank:

Ohm’s law explains the relationship between ……………. in a circuit.

a)

Voltage ,Current and Power

b)

Voltage ,Current and Resistance

c)

Voltage and Current

d)

Only Voltage

4.

How can Ohm's law be written?

a)

R=I/V

b)

V=I×R

c)

V=I/R

5.

What is the definition of "Resistance"?

a)

the pressure from an electrical circuit's power source that pushes current through a conducting loop.

b)

the opposition that a substance offers to the flow of electric current.

c)

The stream of charged particles.

6.
Current is measured in....
a)
Amps 
b)
Volts
c)
Ohms
d)
Coulombs
7.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
8.

Voltage is measured in __.

a)

Volts.

b)

Watts.

c)

Coulombs.

9.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
10.
Voltage is simply defined as...
a)

The energy per unit of charge

b)

what 'stops' electrons

c)

moving electrons

11.
The flow/movement of electric charges 
a)
Voltage
b)
Resistance 
c)
Current 
d)
Circuit 
12.

What is voltage?

a)

the sum of potential energy two points in a circuit

b)

the difference in potential energy between two points a circuit

c)

the speed of electrons as they flow around a circuit

d)

the opposition to the flow of current

13.

Which instrument is used to measure the current in circuit?

a)

coulombmeter

b)

ammeter

c)

voltmeter

d)

ohmmeter

14.

Which instrument is used to measure the voltage between two points in a circuit?

a)

coulombmeter

b)

ammeter

c)

voltmeter

d)

ohmmeter

15.

As you continue to add lightbulbs in series, what happens?

a)

The bulbs get brighter

b)

The bulbs get dimmer

c)

The bulbs remain the same brightness

d)

The bulbs explode and shards of glass get everywhere

16.

If one bulb goes out in a series circuit, the remaining bulbs...

a)

also go out

b)

get brighter

c)

get dimmer

d)

explode, leaving shards of glass everywhere

17.

Current is measured in

a)

Volts

b)

Watts

c)

Seconds

d)

Amps

18.

If the switch was opened, what would happen?

a)

the ammeter would measure a current flowing

b)

current would no longer flow, so everything would be off

c)

the bulbs would stay on because they're connected to the cell

d)

the bulbs would burn out and catch fire

19.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
20.
A material in which electrons are able to move easily
a)
Circuit
b)
Insulator 
c)
Resistance 
d)
Conductor 
21.
This circuit has more than one loop. When one light goes out, the others stay on. 
a)
closed circuit
b)
series circuit
c)
parallel circuit
d)
open circuit
22.
What is the energy source for a circuit?
a)
Light bulb
b)
Battery
c)
Wire
d)
Switch
23.

The picture shows an electrical circuit. This circuit is a series circuit because:

a)

It has 3 light bulbs.

b)

The same current flows through all three light bulbs.

c)

It uses a single battery.

d)

The electrical current is divided between the three light bulbs.

24.

This is an example of a _______ circuit

a)

open

b)

series

c)

parallel

d)

switch

25.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
26.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
27.

A parallel circuit

a)

has only one path for current to travel

b)

has more than one path for current to travel

c)

does not allow electricity to travel through it

d)

has magnets that cause electric current

28.

What is this symbol?

a)

Cell

b)

Switch

c)

Bulb

d)

2 cell battery

29.

What is this symbol?

a)

Cell

b)

Switch

c)

Bulb

d)

Resistor

30.

What is this symbol?

a)

Switch

b)

Fuse

c)

Bulb

d)

2 cell battery

31.

This switch is open.

a)

True

b)

False

32.
This is the symbol for a ...
a)
Bulb
b)
Battery
c)
Horn
d)
Fuse
33.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
34.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
35.
a)
Closed switch
b)
Push switch
c)
Trap door
d)
AC Power supply
36.
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
37.
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
38.

If the battery produced 12.6 Volts what would be the current flow for a 6 Ohm resistor?

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

39.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
40.

If the switch was opened, what would happen?

a)

the ammeter would measure a current flowing

b)

current would no longer flow, so everything would be off

c)

the bulbs would stay on because they're connected to the cell

d)

the bulbs would burn out and catch fire

41.

All the lamps in this circuit have the same resistance. What is the reading of voltmeter V2?

a)

2.5V

b)

1.0V

c)

0.5V

42.

All the lamps in this circuit have the same resistance. What is the reading of voltmeter V1?

a)

1.0V

b)

2.0V

c)

3.0V

43.

All the lamps in this circuit have the same resistance. What is the reading of voltmeter V0?

a)

2.5V

b)

0.5V

c)

1.5V

44.

All the lamps in this circuit have the same resistance. What is the reading of voltmeter V1?

a)

3.7V

b)

7.3V

c)

0.1V

45.

All the lamps in this circuit have the same resistance. What are the readings of ammeters A1 and A2?

a)

A1 = 0.5A A2 = 1.0A

b)

A1 = 1.0A and A2 = 1.5A

c)

A1 = 0.5A and A2 = 0.5A

46.

All the lamps in this circuit have the same resistance. What are the readings of ammeters A1 and A3?

a)

A1 = 3.7A and A3 = 3.7A

b)

A1 = 3.7A and A3 = 7.4A

c)

A1 = 7.4A and A3 = 3.7A

47.

All the lamps in this circuit have the same resistance. What are the readings of ammeters A2 and A3?

a)

A2 = 3.0A and A3 = 3.0A

b)

A2 = 1.5A and A3 = 1.5A

c)

A2 = 6.0A and A3 = 3.0A

48.

All the lamps in this circuit have the same resistance. What are the readings of ammeters A1 and A2?

a)

A1 = 4A and A2 = 2A

b)

A1 = 2A and A2 = 2A

c)

A1 = 2A and A2 = 4A

49.

All the lamps in this circuit have the same resistance. What are the readings of ammeters A1 and A3?

a)

A1 = 2.5A and A3 = 2.5A

b)

A1 = 5A and A3 = 2.5A

c)

A1 = 5A and A3 = 7.5A

50.

All the lamps in this circuit have the same resistance. What are the readings of voltmeters V2 and V3?

a)

V2 = 3.0V and V3 = 1.5V

b)

V2 = 1.5V and V3 = 3.0V

c)

V2 = 1.5V and V3 = 1.5V

51.

All the lamps in this circuit have the same resistance. What are the readings of voltmeters V1 and V2?

a)

V1 = 2.0V and V2 = 2.0V

b)

V1 = 4.0V and V2 = 2.0V

c)

V1 = 2.0V and V2 = 4.0V

52.

All the lamps in this circuit have the same resistance. What are the readings of voltmeters V1 and V3?

a)

V1 = 2.0V and V3 = 1.0V

b)

V1 = 2.0V and V3 = 2.0V

c)

V1 = 1.0V and V3 = 1.0V

53.

A student performed an experiment to determine the number of paper clips that are attracted to an electromagnet as the amount of current changes. The data collected is displayed in the table.

Which graph best describes the relationship between magnetism and electrical current?

a)
b)
c)
d)
54.

If there is a current of 2A and a resistance of 24 ohms, what voltage will there be?

a)

26 V

b)

48 V

c)

12 V

d)

22 V

55.
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
56.

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

57.

Which statement fully describes the graph shown.

a)

As current increases voltage decreases (inversely proportional). This graph does not follow Ohm's law, it is for a non-ohmic component.

b)

As voltage increases current increases (directly proportional). This graph follows Ohm's law, it is for a non-ohmic component.

c)

As voltage decreases current increases (inversely proportional). This graph does not follow Ohm's law, it is for an ohmic component.

d)

As voltage increases current increases (directly proportional). This graph follows Ohm's law, it is for an ohmic component.

58.

This graph is for a filament lamp. What is the reason for the shape of the line shown on the graph?

a)

Filament lamps are variable resistors. So we can use a sliding scale to change their resistance, which will change the current going through them.

b)

Filament lamps cool down when current runs through them, their resistance increases causing the current to decrease over time.

c)

Filament lamps heat up as current runs through them, this increases resistance causing the current to decrease over time.

d)

Filament lamps heat up as current runs through them, this increases resistance causing the current to increase over time.

59.

1. What will happen when these magnets are brought close together?

a)

They will attract each other.

b)

They will repel each other.

c)

Both magnets will turn to the left

d)

Both magnets will turn to the right

60.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
61.
A paper clip is an example of a:
a)
magnetic material
b)
permanent magnet
c)
bar magnet
d)
insulator
62.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
63.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles. 
d)
the middle.
64.
A simple electromagnet can be made with which of the following?
a)
an electric current
b)
a turbine and nail
c)
a nail, a wire, and a battery
d)
a compass and a battery
65.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
66.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.

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