Unit 2 review

What subject is attracted to a magnet?

• Silver

• Water

• Metal

• Iron

What happens when two north poles of a magnet are placed together?

• they repel

• they attract

• they cancel each other out

• the strength of the magnet is doubled

A north pole and a south pole will attract.

• True

• False

True or False: All metals stick to magnets.

• True

• False

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

• at the poles

• in the middle

• above the magnet

• below the magnet

The object inside a radio that makes a speaker work is called a(n) ______________________

• electromagnet

• permanent magnet

• electron cloud

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.

What kind of magnet can be turned on and off?

• refridgerator magnet

• electromagnet

• magnetite

• iron

Surrounding every magnet is a __________  __________.

• magnetic field

• electrical current

• another magnet

• an enemy

The attraction or repulsion created by spinning electric charges is called -

• A. electric generator

• B. magnetic force

• C. solenoid

• D. electromagnet