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Electricity and Magnetism

Total questions: 81

Worksheet time: 1hrs 1mins

Name
Class
Date
1.

Calculate the current (I) going through this circuit when the voltage (V) is 9.0 volts and the resistance (R) of the resistor is 3 ohms.

Use the formula I = V/R. I = 9.0 volts / 3 ohms = ??? amps or amperes

a)

1 amp

b)

2 amps

c)

3 amps

d)

4 ampls

2.

Calculate the current (I) going through this circuit when the voltage (V) is 9.0 volts and the resistance (R) of the resistor is 3 ohms.

Use the formula I = V/R. I = 9.O volts / 3 ohms = ??? amps or amperes

a)

1 amp

b)

3 amps

c)

5 amps

d)

7 ampls

3.

Calculate the current (I) going through this circuit when the voltage (V) is 8.0 volts and the resistance (R) of the resistor is 2 ohms.

Use the formula I = V/R. I = 8.0 volts / 2 ohms = ??? amps or amperes

a)

1 amp

b)

4 amps

c)

5 amps

d)

7 ampls

4.

Calculate the current (I) going through this circuit when the voltage (V) is 12.0 volts and the resistance (R) of the resistor is 6 ohms.

Use the formula I = V/R. I = 12.0 volts / 6 ohms = ??? amps or amperes

a)

1 amp

b)

2 amps

c)

3 amps

d)

4 ampls

5.

Calculate the voltage (V) going through this circuit when the current (I) is 2 amps and the resistance (R) of the resistor is 5 ohms.

Use the formula V = IR. I = 2.0 amps x 5 ohms = ??? volts

a)

6 volts

b)

8 volts

c)

10 volts

d)

12 volts

6.

This is an example of a -------- circuit.

a)

Series

b)

Parallel

c)

Combination

7.

This is an example of a -------- circuit.

a)

Series

b)

Parallel

c)

Combination

8.

In this circuit, the bulb(s) that light up are:

a)

1 only

b)

2 only

c)

1 and 2

d)

None of them

9.

In this circuit, the bulb(s) that light up are:

a)

1 only

b)

2 only

c)

1 and 2

d)

None of them

10.

The bulbs have the same resistance. The brightest bulb in this circuit is:

a)

1 only

b)

2 only

c)

Same brightness

d)

None of them

11.

The bulbs have the same resistance. The brightest bulb is:

a)

1 only

b)

2 only

c)

1 and 2

d)

None of them

12.

This circuit shows:

a)

Conventional flow

b)

Electron flow

c)

Electricity

d)

This diagram is incorrect

13.

This diagram shows:

a)

Conventional flow

b)

Electron flow

c)

Electricity

d)

This diagram is incorrect

14.

This circuit will work.

a)

Yes

b)

No

15.

The fault in this circuit is the:

a)

Ammeter

b)

Cell

c)

Bulb

d)

There is no fault.

16.

The fault in this circuit is the:

a)

Bulb

b)

Cell

c)

Voltmeter

d)

There is no fault.

17.

The bulbs in this circuit have the same resistance. The reading on A2 is:

a)

4A

b)

2A

c)

1A

d)

No reading

18.

The bulbs in this circuit have the same resistance. The reading on V2 is:

a)

6V

b)

3V

c)

9V

d)

No reading

19.

The bulbs in this circuit have the same resistance. The reading on V1 is:

a)

6V

b)

12V

c)

9V

d)

No reading

20.

The bulbs in this circuit have the same resistance. The reading on A2 is:

a)

4A

b)

8A

c)

2A

d)

No reading

21.

What type of circuit is this?

a)
b)
22.

What type of circuit is this?

a)
b)
23.

What type of circuit is this?

a)
b)
24.

What type of circuit is this?

a)
b)
25.

What type of circuit is this?

a)
b)
26.

What type of circuit is this?

a)
b)
27.
This is the symbol for a ...
a)
Bulb
b)
Battery
c)
Horn
d)
Fuse
28.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
29.

How can you make the bulb brighter?

a)

Add more bulbs

b)

Add more batteries

c)

Make the wires shorter

d)

Add extra wires

30.

What would happen if you added an extra bulb?

a)

Nothing

b)

The light bulb would get dimmer

c)

The light bulb would get brighter

d)

The circuit wouldn't work

31.

In a series connection, why do remaining bulbs not light up when one bulb is taken out of its holder?

a)

The path of electric current was renewed.

b)

The other bulbs will not light.

c)

The path of electric current became incomplete.

d)

The other bulbs were burnt out.

32.

Mary Ann noticed that a set of ten bulbs in her Christmas tree lights did not light up when it was turned on. What could be a probable cause of this?

a)

Small bulbs are used.

b)

Small wires are used.

c)

There are bulbs in the strand.

d)

There is one defective bulb in the set.

33.
a)
Series circuit - Bulbs are lit
b)
Series circuit - Bulbs are off
c)
Parallel circuit - Bulbs are lit
d)
Parallel circuit - Bulbs are off
34.
This circuit does not work because…
a)
the bulbs are not connected properly
b)
the single cell is not powerful enough
c)
there is a break in the circuit
d)
there is a short crcuit
35.
What is the energy source for a circuit?
a)
Light bulb
b)
Battery
c)
Wire
d)
Switch
36.

Which of the following would all be connected in series?

a)

A lamp and a switch on the wall controlling it.

b)

Two lamps in a room controlled by the same switch.

c)

Two lamps in different rooms of a house.

d)

The air conditioner and microwave oven in your home.

37.

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

38.

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

39.

Magnetism is a type of ____________

a)

phenomena

b)

contact force

c)

non-contact force

d)

field

40.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
41.
What would we call a nail that can pick up a paperclip because it is touching a magnet?
a)
temporary magnet
b)
poles
c)
force
d)
detector
42.
True or False: All metals are attracted to magnet.
a)
True
b)
False
43.

Which two metals will be attracted by a magnet?

a)

aluminum and lead

b)

gold and silver

c)

iron and steel

d)

copper and cobalt

44.
The space around a magnet where the force of a magnet can attract best is called__________
a)
magnetism
b)
bar magnet
c)
horseshoe magnet
d)
magnetic field
45.
Ancient people discovered magnetic rocks called lodestone. What did they use them for?
a)
fires
b)
compasses
c)
sculptures
d)
weapons
46.
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.
47.
The needle of a compass always points to which direction?
a)
south
b)
east
c)
west
d)
north
48.
Earth acts like a giant magnet because its center is made up MOSTLY of
a)
granite
b)
limestone
c)
iron
d)
nickel
49.

Why does a compass needle point north?

a)

Because it is being attracted to the Magnetic South Pole

b)

Because north is up

c)

Because it is being attracted to the Magnetic North Pole

d)

Because north is down

50.
You know this substance is magnetized because
a)
all the domains have right angles
b)
the arrows are drawn in red
c)
the domains are aligned
d)
the domains are random
51.

This substance is

a)

magnetized

b)

unmagnetized

c)

positively charged

d)

negatively charged

52.
What is our best evidence that Earth has a magnetic field?
a)
All things fall toward Earth's center
b)
A compass needle lines up with it
c)
Winds blow from east to west
d)
Earth's oceans all have currents
53.
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
54.
The picture is an example of an:
a)
Electric circuit
b)
Electromagnet
c)
Electric nail
d)
Electric power cell
55.

The entire region surrounding a magnet is known as the:

a)

Direction

b)

Movement

c)

A Compass

d)

Magnetic Field

56.

A magnet can attract all metals.

a)

True

b)

False

57.

A magnet cannot attract all non-metals.

a)

True

b)

False

58.

A magnet will always point in an East-West direction.

a)

True

b)

False

59.

The North pole of a magnet will repel the South pole of

another magnet.

a)

True

b)

False

60.

A magnet is strongest at its poles.

a)

True

b)

False

61.

A magnet can attract or repel another magnet from a

distance.

a)

True

b)

False

62.

A magnet cannot attract an object made of magnetic

material from a distance

a)

True

b)

False

63.

Magnetism can pass through non-magnetic materials.

a)

True

b)

False

64.

Choose 3 object that can be attracted by a magnet.

a)

Handkerchief

b)

Steel ruler

c)

Aluminium can

d)

Iron Nail

e)

Paper clip

65.

Which of the following is not method of magnetisation?

a)

Electrical method

b)

Stroke method

c)

Touch method

d)

Iron method

66.

Name this magnet

a)

Rod Magnet

b)

Horseshoe maget

c)

Button magnet

d)

Ring magnet

67.

A magnet has a _______ pole and a _______ pole.

a)

north, south

b)

east, west

c)

positive, negative

d)

red, blue

68.

Which of the following would a magnet ATTRACT?

a)

A copper penny

b)

An iron nail

c)

A piece of glass

d)

A wood block

69.

All metals are magnetic.

a)

True

b)

False

70.

What is a difference between a magnet and a magnetic material?

a)

Magnets are metals and magnetic materials are not.

b)

Magnetic materials attract to either pole of a magnet; magnets only attract to opposite poles.

c)

Magnets are attracted to magnets and magnetic materials are repelled by magnets.

d)

Magnets and magnetic materials are the same thing.

71.

Why does the Earth have a magnetic field?

a)

Because of all the magnets on the Earth's surface

b)

Because the Earth is a magnet

c)

Because the Earth is made of copper

d)

Because Earth is orbiting around the sun

72.

These objects would...

a)

Attract

b)

Repel

c)

No reaction

73.

These objects would...

a)

Attract

b)

Repel

c)

No reaction

74.

These objects would...

a)

Attract

b)

Repel

c)

No reaction

75.

Magnets can exert force over a distance because of its...

a)

size

b)

shape

c)

magnetic field

d)

density

76.

Magnetic force is strongest at...

a)

the north pole

b)

the south pole

c)

both poles

d)

the middle of the magnet

77.

In order to create these magnetic fields, what would the pole order have to be on the covered magnet?

a)

SN

b)

NS

c)

It could be either order.

d)

It is not a magnet - it has no poles.

78.

What does this picture represent?

a)

Magnetic forces between like poles

b)

Magnetic forces between opposite poles

c)

Magnetic forces between two metals

79.

Which material is NOT necessary to make a simple motor?

a)

Battery

b)

Magnets

c)

Steel nail

d)

Copper wire

80.

What is the role of the copper wire in this motor?

a)

It carries the flow of electrons.

b)

It powers the motor.

c)

It creates a magnetic field.

d)

It makes it look nice.

81.

A motor spins because of the combination of...

a)

Electricity and magnetic forces

b)

Metal and magnets

c)

Gears and wires

d)

Batteries and electricity

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