Magnetism Review

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

• at the poles
• above the magnet
• in the middle
• below the magnet

What will happen when the north poles of two magnets are brought close together.

• They will attract each other
• They will repel each other
• nothing will happen

When the domains within a metal are not aligned, the metal is

• magnetized
• unmagnetized
• positively charged
• negatively charged

An iron nail is attracted to a magnet and becomes magnetized while it is in the magnetic field. The nail is a

• permanent magnet
• temporary magnet
• electromagnet

The earth is one giant magnet

• true
• false

Which of the following would be considered magnetic? (Check all that apply)

• aluminium
• iron
• nickel
• cobalt

When two magnets repel, they

• push apart
• pull together
• change color
• change shape

Which of the following methods will increase the power of an electromagnet? (Check all that apply)

• increase current
• add coils (turns) around the magnet
• reduce the current
• add additional magnets

How is a permanent magnet DIFFERENT from a temporary magnet?

• A permanent magnet attracts materials made of iron.
• A permanent magnet has poles.
• A permanent magnet has a magnetic field.
• A permanent magnet keeps its magnetism for a long time.

Why does a compass needle point north?

• The compass is a bar magnet
• Because north is up
• Because it's magic
• It lines up with the Earth's magnetic field