Electromagnetism

The area around a magnet is called the .....

• attraction zone

• work area

• magnetic field

• hot zone

Which of the following are two effects of Earth’s magnetic field?

• A. compass points to geographic north, auroras seen at both poles  
• B. compass points to magnetic north, auroras seen at both poles
• C. compass points to geographic south, auroras seen at the equator
• D. compass points to geographic north, auroras seen at the equator

These magnetic domains are:

• strongly magnetized

• slightly magnetized

• unmagnetized

What can demagnetize a magnet?

• A. high altitudes
• B. high temperatures
• C. low altitudes 
• D. low temperatures

The strongest parts of the magnet are ...

• fronts

• backs

• poles

• middle

What happens when we rub a needle on a magnet several times?

• The needle breaks
• The needle becomes a magnet.
• We get a compass.
• The needle floats.

Which of the following are two kinds of magnets?

• A. atoms, domains
• B. magnetic fields, magnetic poles
• C. ferromagnets, electromagnets
• D. magnesia magnets, magnetite magnets

A compass needle responds to a magnetic field, because the compass needle is a

• A. generator.
• B. motor.   
• C. magnet.
• D. transformer.

Why does the compass needle move at different locations?

• Because the needle is attracted to the magnetic field produced by the magnet

• Because north is up

• Because it is being attracted to the Magnetic North Pole

• Because north is down

The process of creating a current in a circuit by changing a magnetic field

• A. electric generator
• B. electric motor
• C. electromagnetic induction
• D. magnet