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magnetism

Total questions: 77

Worksheet time: 58mins

Name
Class
Date
1.

Look at the picture carefully.

Which screws will be attracted?

a)

iron and steel screws

b)

iron and aluminum screws

c)

steel and aluminum screws

d)

all screws

2.

What would happen when two north poles of magnets are placed together?

a)

The force will pull them together (attract).

b)

The force will push them away from each other (repel).

c)

The strength of the magnet is doubled.

3.

What would happen when the opposite poles of magnets are placed together?

a)

The force will pull them together (attract).

b)

The force will push them away from each other (repel).

c)

The strength of the magnet is doubled.

4.

True or False: All metals are attracted to magnet.

a)

True

b)

False

5.

Where is the force of attraction the strongest on a magnet?

a)

above the magnet

b)

below the magnet

c)

at the poles

d)

in the middle

6.

What do the lines around this magnet represent?

a)

North Pole

b)

South Pole

c)

Magnetic Declination

d)

Magnetic Field

7.

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 South Pole.

c)

Both halves get only a North Pole.

d)

Both halves get a North pole and a South Pole.

8.

What is responsible for the Magnetic Field around Earth?

a)

The Sun

b)

The Earth's core

c)

The Earth's crust

d)

The Earth's mantle

9.

Look at the picture carefully.

The paper clips are . . .

a)

magnet

b)

magnetic objects

10.

Which of these materials would be attracted to a magnet?

a)

copper

b)

aluminum

c)

cobalt

d)

iron

11.

Magnetism is a _________ force

a)

non-contact

b)

contact

c)

chemical

d)

biological

12.

The two poles are called the _______ poles

a)

east and west

b)

north and east

c)

south and west

d)

north and south

13.

Unlike (opposite) poles _____, like (same) poles _____

a)

repel, attract

b)

connect, repel

c)

attract, repel

d)

repel, connect

14.
A particle that carries a negative electric charge is called a(n) ______.
a)
neutron
b)
atom
c)
proton
d)
electron
15.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
16.

Which object would a magnet attract?

a)

a glass bottle

b)

a piece of paper

c)

a steel paper clip

d)

a rubber eraser

17.
A magnetized iron nail is called a ________ magnet.
a)
permanent
b)
temporary
c)
horseshoe
d)
industrial
18.

A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.

a)

calculator

b)

ruler

c)

compass

d)

map

19.
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).
20.
Earth's magnetic poles are in the same place as the geographic poles.
a)
True
b)
False
21.
The needle of a compass always points _________________________.
a)
at the equator
b)
North
c)
South
d)
What's a compass?
22.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
23.
If you place the North pole of a magnet next to the South pole of another magnet, they will:
a)
Attract
b)
Repel
c)
Do nothing
d)
Shatter
24.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
25.

Opposite charges _____ and like charges ____.

a)

attract, repel

b)

repel, attract

26.

All metals are magnetic

a)

TRUE

b)

FALSE

27.
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
28.
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
29.
2 ways to increase the magnetic force of an electro-magnet
a)
Increase the current flow, reduce the number of coils
b)
Increase the voltage, decrease the number of coils
c)
Increase the number of coils and the current flow
d)
Spread out the coils, replace iron core with rubber.
30.

The two poles are called the _______ poles

a)

east and west

b)

north and east

c)

south and west

d)

north and south

31.

Unlike (opposite) poles _____, like (same) poles _____

a)

repel, attract

b)

connect, repel

c)

attract, repel

d)

repel, connect

32.

Which of the following converts electrical energy into mechanical energy?

a)

Motor

b)

Battery

c)

Generator

d)

Switch

33.

The part of the AC generator that passes the current from the armature coil to the external circuit is

a)

Field magnets

b)

Split rings

c)

Slip rings

d)

Brushes

34.

Transformer works on

a)

AC only

b)

DC only

c)

Both AC and DC

d)

AC nor effiectively than DC

35.

The unit of magnetic flux density is

a)

Webber

b)

Webber/meter2

c)

Webber/meter

d)

Webber. Meter2

36.

Devices which is used to convert high alternating current to low alternating current is …………………

a)

Step up transformer

b)

Step down transformer

37.

A device for producing electric current is ……………………

a)

Motor

b)

Generator

c)

Transformer

38.

A generator converts mechanical energy into electrical energy

a)

True

b)

False

39.

Magnetic field lines always repel each other and do not intersect

a)

True

b)

False

40.

The speed of rotation of an electric motor can be increased by decreasing the area of the coil

a)

True

b)

false

41.

A transformer can step up direct current

a)

True

b)

False

42.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
43.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
44.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
45.
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
46.
If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move?
a)
Clockwise
b)
Counter-clockwise
c)
It will not move
d)
Need more information
47.
An electromagnet's poles may be reversed by:
a)
decreasing the voltage of the coil
b)
increasing the number of coils
c)
changing the direction of current flow
d)
altering the material used to make the coils
48.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
49.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles. 
d)
the middle.
50.
Magnetic NORTH is actually geographic _________
a)
SOUTH
b)
NORTH
c)
EAST
d)
WEST
51.
Electricity can be used to create a magnet
a)
True
b)
False
52.
You can make an electromagnet stronger by...
a)
increasing the current through the wire
b)
make the iron core bigger
c)
increase the number of loops around the core
d)
All of these
53.
If you place the North pole of a magnet next to the South pole of another magnet, they will:
a)
Attract
b)
Repel
c)
Do nothing
d)
Shatter
54.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
55.

A device that uses a free-moving magnetic needle to show direction is a:

a)

Ruler

b)

magnet

c)

compass

d)

magnetic field

56.
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
57.
Magnetism is a type of ____________
a)
force
b)
book
c)
plant
d)
animal
58.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
59.
When two magnets repel, they ________________
a)
change color
b)
pull together
c)
push apart
d)
get colder
60.
Magnets have a north and a south ___________
a)
shape
b)
color
c)
pole
d)
region
61.
Two north poles will attract.
a)
True
b)
False
62.
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
63.
The force of magnetism is stronger when magnets are ________________
a)
cold
b)
round
c)
closer together
d)
farther apart
64.
Surrounding every magnet is a __________  __________.
a)
magnetic field
b)
electrical current
c)
another magnet
65.
How many poles does a magnet have?
a)
1
b)
2
c)
3
d)
4
66.
Magnets that are arranged like this will _______. 
a)
move away from each other (repel)
b)
move towards each other (attract)
67.
What happens if you cut a bar magnet in half?
a)
You get two North pole magnets
b)
You get two South pole magnets
c)
You get a North pole magnet and a South pole magnet
d)
You get two smaller magnets, each with a North and South pole
68.
The strongest point on a magnet is located
a)
In the magnetic field
b)
Center of the magnet
c)
At the Poles (close)
d)
At the Poles (further away) 
69.
GLASS
Magnetic or Non-Magnetic?
a)
magnetic
b)
non-magnetic
70.
NICKEL
Magnetic or
Non-Magnetic?
a)
magnetic
b)
non-magnetic
71.
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.
72.
On Earth, where is Magnetic North approximately located?
a)
The Equator
b)
The North Pole
c)
The South Pole
d)
New Brighton
73.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
74.
A refrigerator magnet is an example of a:
a)
magnetic material
b)
permanent magnet
c)
horseshoe magnet
d)
temporary magnet
75.
A paper clip is an example of a:
a)
magnetic material
b)
permanent magnet
c)
bar magnet
d)
insulator
76.
If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move?
a)
Clockwise
b)
Counter-clockwise
c)
It will not move
d)
Need more information
77.
This is an example of...
a)
attraction
b)
repulsion

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