Electromagnetism
14 minutes ago
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• Question 1
30 seconds
Q.

What happens to the strength of a magnetic field as you move away from the magnet?

The strength of the magnetic field increases.

The strength of the magnetic field doesn't change.

The strength of the magnetic field is doubled.

The strength of the magnetic field decreases.

• Question 2
30 seconds
Q.

Particles with opposite charges ____________ and particles with same (or like) charges ____________.

attract, repel

repel, repel

attract, attract

repel, attract

• Question 3
30 seconds
Q. How do you make an electromagnet stronger?
Add more light bulbs and/or wire coils
add more wire coils and/or a switch
add more wire coils and/or batteries
• Question 4
60 seconds
Q. This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
Add more coils of wire to the nail.
Use a smaller battery.
Reverse the poles of the magnet.
Remove all the coils and the nail.
• Question 5
30 seconds
Q.

Which of the following is not a good conductor?

Copper

Silver

Aluminum

Plastic

• Question 6
30 seconds
Q.

What happens when an electric current flows through a wire?

The wire begins to spin.

Nothing happens.

A field of gravity is created around the wire.

A magnetic field is created around the wire.

• Question 7
30 seconds
Q.

What does this image show?

Parallel circuit

Series circuit

Magnet

Electromagnet

• Question 8
30 seconds
Q.

The area of magnetic force around a magnet is known as its ____________.

magnetism

magnetic current

magnetic field

electric current

• Question 9
30 seconds
Q.

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

decrease

increase

not affect

• Question 10
30 seconds
Q.

What type of core is best for electromagnets?

Steel

Iron

Plastic

Copper

• Question 11
30 seconds
Q.

As the strength of a magnetic field increases, the ability to attract metal objects ____________.

increases

decreases

stays the same

• Question 12
30 seconds
Q.

What conclusion can you draw from this graph?

As current increases, magnetic strength decreases.

As current increases, magnetic strength increases.

As current decreases, magnetic strength increases.

There is no relationship between current and magnetic strength.

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