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Worksheets

Magnetism

Total questions: 71

Worksheet time: 36mins

Name
Class
Date
1.

Which of the following is the correct explanation of the electrical motor operation?

a)

Electric motor uses electricity

b)

The operation is based on the principle of electromagnetism

c)

The motor converts electric energy into mechanical energy

d)

All of the above

2.

What do you call an energy-converting system that transforms electrical energy into mechanical movement?

a)

Electric motor

b)

Electric field

c)

Electric generator

d)

Electric plasma

3.

The two poles on a magnet are...

a)

positive and negative

b)

north and south

c)

east and west

d)

up and down

4.

The arrows drawn on magnetic field lines always point...

a)

north to south

b)

south to north

5.

The direction of a magnetic field can be shown using iron filings.

a)

True

b)

False

6.

Where is the magnetic field the strongest around a bar magnet?

a)

far away from the magnet

b)

at the side of the magnet

c)

at the poles

d)

above the magnet

7.

When running a current through a wire, what do the blue lines represent?

a)

The wire spinning

b)

A magnetic field that was created

c)

Electrons leaving

d)

Electricity

8.
A coil of wire with an electric current in it is called a(n)
a)
A. transformer.
b)
B. electric generator.
c)
C. electric motor.
d)
D. solenoid.
9.

What would happen is a north pole of a magnet came close to a north pole of another magnet?

a)

they would be attracted to each other

b)

they would be repelled from each other

10.

The area around a magnet is called the .....

a)

attraction zone

b)

work area

c)

magnetic field

d)

hot zone

11.

Why does the compass needle move at different locations?

a)

Because the needle is attracted to the magnetic field produced by the magnet

b)

Because north is up

c)

Because it is being attracted to the Magnetic North Pole

d)

Because north is down

12.

These magnetic domains are:

a)

strongly magnetized

b)

slightly magnetized

c)

unmagnetized

13.

To make this electromagnet stronger you could:

a)

use less wire

b)

have fewer wire coils around the nail

c)

have more wire coils around the nail

d)

use a plastic core

14.
What is true about electricity and magnetic fields?
a)
Electricity is needed to create any magnet.
b)
Electricity always creates a magnetic field.
c)
Electricity is stronger than a magnetic field.
d)
Electricity prevents magnetic fields from occurring.
15.
A compass needle responds to a magnetic field, because the compass needle is a
a)
A. generator.
b)
B. motor.   
c)
C. magnet.
d)
D. transformer.
16.
Are the magnetic field lines in the picture correct?
a)
Yes, because they point from north to south.
b)
No, because they point from north to south (they're supposed to go the other way).
c)
Yes, because the North pole is on the left in all pictures.
d)
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
17.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
18.
A tiny region in a magnet where all the atoms are grouped together and their poles are aligned.
a)
Domain
b)
North
c)
South
d)
Commutator
19.
This material is hard to magnetize, but stays magnetized
a)
temporary
b)
permanent
c)
ferromagnet
d)
electromagnet
20.
As an electron moves, it makes, or induces a(n)
a)
acceleration.
b)
ferromagnet.
c)
chemical reaction.
d)
magnetic field.
21.
As an electron moves, it makes, or induces a(n)
a)
acceleration.
b)
ferromagnet.
c)
chemical reaction.
d)
magnetic field.
22.

What conclusion can you draw from this graph?

a)

As current increases, magnetic strength decreases.

b)

As current increases, magnetic strength increases.

c)

As current decreases, magnetic strength increases.

d)

There is no relationship between current and magnetic strength.

23.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
24.
Magnets can be used to create electricity? 
a)
True
b)
False
25.

A device that converts mechanical energy into electrical energy

a)

A. electric generator

b)

B. electric motor

c)

C. electromagnetic induction

d)

D. electric meter

26.

Using the right-hand-slap rule, A represents

a)

The current

b)

The magnetic field

c)

The direction of the force

27.

Using the right-hand-slap rule, B represents

a)

The current

b)

The magnetic field

c)

The direction of the force

28.

Using the right-hand-slap rule, C represents

a)

The current

b)

The magnetic field

c)

The direction of the force

29.

Using the right hand grip rule, A represents the direction of the

a)

current

b)

magnetic field

30.

Using the right hand grip rule, B represents the direction of the

a)

current

b)

magnetic field

31.

Using the right hand grip rule, if the current is flowing towards you then the magnetic fields will flow from...

a)

A to D to C to B and around

b)

A to B to C to D and around

c)

A to C to D to B and around

d)

A to C to B to D and around

32.

Using the right hand grip rule, if the current is flowing away from you then the magnetic fields will flow from...

a)

A to D to C to B and around

b)

A to B to C to D and around

c)

A to C to D to B and around

d)

A to C to B to D and around

33.

In the solenoid pictured, the north pole would be on the

a)

Left side

b)

Right side

34.

In the solenoid pictured, the south pole would be on the

a)

Left side

b)

Right side

35.

Using the right hand slap rule, if the force is coming towards you and the current is travelling upwards then the

a)

magnetic fields are going to the left

b)

magnetic fields are going to the rightt

c)

magnetic fields are going upwards

d)

magnetic fields are going downwards

36.

Using the right hand slap rule, if the force is coming towards you and the current is travelling downwards then the

a)

magnetic fields are going to the left

b)

magnetic fields are going to the rightt

c)

magnetic fields are going upwards

d)

magnetic fields are going downwards

37.

If you brought an unknown pole of a magnet near a North magnetic pole and they repel what is the unknown pole?

a)

North

b)

South

c)

Neutral

d)

not enough information

38.

Using the right hand slap rule, if the force is coming towards you and the magnetic fields are going to the left then the

a)

current is going upwards

b)

current is going downwards

c)

current is going to the left

d)

current is going to the right

39.

Using the right hand slap rule, if the force is going away from you and the magnetic fields are going to the left then the

a)

current is going upwards

b)

current is going downwards

c)

current is going to the left

d)

current is going to the right

40.

Using the right hand slap rule, if the magnetic fields are going to the left and the current is going downwards then the

a)

force is going towards you

b)

force is going away from you

c)

force is going to the left

d)

force is going to the right

41.

Using the right hand slap rule, if the magnetic fields are going to the right and the current is going downwards then the

a)

force is going towards you

b)

force is going away from you

c)

force is going to the left

d)

force is going to the right

42.

Electric current is measured in ____________.

a)

Newtons (N)

b)

Amperes (A)

c)

Hertz (Hz)

d)

Volts (V)

43.

Increasing the number of coils in an electromagnet will _________ the power of the magnet.

a)

decrease

b)

increase

c)

not affect

44.

What three minerals are attracted to a magnet?

a)

Gold, copper, cobalt

b)

Cobalt, aluminum, silver

c)

Iron, copper, aluminum

d)

Iron, nickel, cobalt

45.
According to the Right Hand Rule, where is the magnetic field generated around a current-carrying wire?
a)
Perpendicular to the wire
b)
Parallel to the wire
46.

What happens if you cut a magnet in half?

a)

Nothing

b)

The magnets repel

c)

There will be two magnets

47.

Which of the following is used to measure very small currents?

a)

galvanometers

b)

ammeters

c)

voltmeters

d)

electric motors

48.

Which of the following is used to measure large currents?

a)

galvanometers

b)

ammeters

c)

voltmeters

d)

electric motors

49.

Which of the following is used to measure voltage?

a)

galvanometers

b)

ammeters

c)

voltmeters

d)

batman

50.

A faster moving charged particle would experience a larger magnetic force than a slower moving charged particle.

a)

True

b)

False

51.

A 2.0 m long wire carrying 10 A of current moves through an 6.0 T magnetic field. What is the magnetic force acting on the wire?

a)

10 N

b)

120 N

c)

0.5 N

d)

2 N

52.

A 2 C charge moving at 15 m/s enters into a magnetic field of strength 5 T. What is the maximum force experienced by this charge?

a)

150 N

b)

150 N into the page

c)

360 N

d)

360 N out of the page

53.

A 5 C charge moving at 6 m/s toward the bottom of the page encounters a 12 T magnetic field pointed toward the right of the page. What is the magnetic force acting on the charge?

a)

150 N

b)

150 N into the page

c)

360 N

d)

360 N out of the page

54.

Magnets are made of tiny sections of magnetic fields that are aligned to produce a larger magnetic field. These are called _____.

a)

magnetic domains

b)

magnetic fields

c)

magnetic sections

d)

electromagnets

55.

A _____ is a device that has a magnetic needle that spins freely. It is used for navigation because its needle usually points north.

a)

calculator

b)

compass

c)

GPS

d)

map

56.

What is Earth Magnetic Field?

a)

is a part of the earth

b)

Is a magnetic field that emanates from Earth's core and encircles the Earth.

c)

i don´t now

d)

it is a magnetic field that causes damage to the planet earth

57.

What is the importance of the Earth magnetic field?

a)

protects us from the damage that the solar wind can cause

b)

protects us from pollution

c)

protects us from lasers

d)

protects us from the damage that the moon can cause

58.

A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:

a)

Will decrease

b)

Will increase

c)

Will become zero

d)

Will remain the same

59.

Who was the first to observe the magnetic effect of electric current?

a)

Faraday

b)

Oersted

c)

Volta

d)

Ampere

60.

What is magnetic field?

a)

“The region surrounding a magnet, in which the force of the electrons can be detected ,

b)

“The region surrounding a magnet, in which the power of the magnet can be detected ,

c)

“The region surrounding a magnet, in which the force of the electricity can be detected ,

d)

“The region surrounding a magnet, in which the force of the magnet can be detected ,

61.

The direction of magnetic field developed around a current -carrying conductor can be easily found by the use of

a)

right hand thumb rule

b)

left hand thumb rule

c)

Fleming's left hand rule

d)

Fleming's right hand rule

62.

In the Earth, the magnetic North pole coincides with the....

a)

South geographical pole.

b)

North geographical pole.

63.
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
64.
What is responsible for the Magnetic Field around Earth?
a)

The Earth's crust

b)

The Earth's molten iron core

c)

The Earth's mantel

d)

The Sun

65.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
66.
The strength of the magnetic field of a electromagnet can be increased by
a)
Decreasing the number of coils.
b)
Increasing the number of coils
c)
Decreasing the current
d)
Increasing the resistance
67.
What would increase the strength of an electromagnet?
a)
Increasing the amount of current flowing through the wire.
b)
Inserting a wooden core inside the coil
c)
Changing the direction of the current
d)
Decreasing the number of coils of wire
68.
A coil of wire with an electric current in it is called a(n)
a)
A. transformer.
b)
B. electric generator.
c)
C. electric motor.
d)
D. solenoid.
69.

What is the difference between a soft magnet and a hard magnet?

a)

A soft magnet is magnetized easily and loses magnetization easily, while a hard magnet is difficult to magnetize but retains its magnetization well.

b)

A soft magnet is a type of electromagnet, while a hard magnet is a type of permanent magnet.

c)

A soft magnet is used for temporary magnetic applications, while a hard magnet is used for permanent magnetic applications.

d)

A soft magnet has a low magnetic field, while a hard magnet has a high magnetic field.

70.

Which of the following materials is an example of a soft magnet?

a)

Samarium-cobalt

b)

Iron

c)

Neodymium

d)

Nickel

71.

Which of the following materials is an example of a hard magnet?

a)

Ferrite

b)

Nickel

c)

Iron

d)

Steel

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