Ch.8 Magnetism Quiz

Which are the 4 ways to increase the strength of an electromagnet?

• Increase current, add more turns, increase voltage, decrease the core material

• Decrease current, decrease turns, decrease voltage, increase the core material

• Increase current, add more turns, decrease voltage, increase the core material

• Increase current, add more turns, increase voltage, increase the core material

Like poles will:

• Attract

• Explode

• Repel

• Turn off

What material is contained in objects that attract magnets? (1pt)

• Aluminum

• Copper

• Iron

• Plastic

Which example shows like poles?

• North-North

• North-South

• South-North

• None

What is a solenoid? (1pt)

• A type of magnet

• A type of metal

• A coil of wire

• A type of battery

Bar magnets are strongest in:

• The middle

• The poles

• a and b are correct

• None of the above

For a maglev train to float, which pole of the guideway's magnet should face the north pole of the train car's magnet? (1pt)

• North pole

• South pole

• It doesn't matter

• Both poles

Tell a difference between a magnet and an electromagnet? (1pt)

• Magnets only have one pole

• Electromagnets need electricity to function

• Magnets can't attract metal

• Electromagnets are always stronger

What is the main function of a solenoid? (1pt)

• To generate electricity

• To produce heat

• To create a magnetic field

• To store energy

When like poles of magnets are brought close together, what will happen? (1pt)

• They will attract

• They will repel

• They will cancel each other out

• They will create a new pole