Electromagnetism

As electrons move, they make

• A. electromagnetism.
• B. auroras.
• C. ferromagnetism.
• D. magnetic fields.

The attraction or repulsion created by spinning electric charges

• A. electric generator
• B. magnetic force
• C. solenoid
• D. electromagnet

A device that increases or decreases the voltage of alternating current

• A. magnet
• B. magnetic pole
• C. transformer
• D. magnetic force

A device that converts electrical energy into mechanical energy

• A. electromagnet
• B. electromagnetic induction
• C. electric motor
• D. electromagnetism

A device that converts mechanical energy into electrical energy

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

What is created when a magnet moves through a coil of wire?

• A. an electromagnet
• B. a ferromagnet
• C. a solenoid
• D. an electric current

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

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

What kind of magnet can be turned on and off?

• refrigerator magnet
• electromagnet
• magnetite
• iron

If you wrap more coils around an electromagnet, it will become 

• brighter
• stronger
• weaker
• invisible