Electro Magnetism Test

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

What can demagnetize a magnet?

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

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

What kind of magnet can be turned on and off?

• refrigerator magnet
• electromagnet
• magnetite
• iron

What is the flow of electricity?

• electric motor
• Electric current
• Electric eel
• electric circuit

A magnet will pick up a nail, but not a penny because the nail

• has rust on it.
• is lighter than the penny.
• has a sharp point.
• contains iron.

Which is NOT a use of magnets?

• Generating electricity
• Holding cabinet doors closed
• Sorting paper from plastic
• Storing information on computer hard drives.

_{^{The magnet's shown will}}

• not move
• attract
• repel
• all of the above