Magnetism Review

What happens to the magnetic field if you switch the power source (ex. a battery) around?

• The magnetic field would disappear.
• The magnetic poles would switch.
• Nothing would change.

A push or pull caused by magnetism is referred to as

• magnetic force.
• gravity.
• velocity.
• direction.

What happens if you cut a magnet in half?

• It is no longer a magnet.
• It has two south ends.
• It has two north ends.
• It makes two smaller magnets.

When the same _____ of two magnets are brought near each other, they repel.

• strengths
• poles
• domains
• fields

What three metals are most commonly used in magnets?

• iron, nickel, and cobalt
• iron, silver, and nickel
• iron, cobalt, and silver
• iron, silver, and copper

Earth's magnetic field is strongest at the _____.

• equator
• north pole
• south pole
• both poles equally

What happens to Earth's magnetic field as you move closer to the equator?

• it gets stronger
• it weakens
• it increases
• nothing happens

What may happen if a magnet is dropped?

• nothing
• magnetism increases
• loses its magnetism

Which image below is the correct representation of an electromagnet?

• 
• 
• 
• 

Bob is using an electromagnet to operate a motor. How can he make the motor stronger?

• Increase the number of wire wraps around the iron metal core.
• Increase the size of the power source (battery).
• Both of the above will increase the strength.