Electromagnet and Magnetism Recap

Multiple Choice

How do electromagnets differ from regular magnets? 

• A. They  can be turned off and on 
• B. Their polarity can be reversed
• C. Their strength can be changed
• D. All of the above

Multiple Choice

What would happen if you took one end of the wire off the battery?

• The nail will be a magnet.

• The nail would no longer be a magnet

• Nothing will happened.

• The nail will heats up.

Multiple Choice

Which electromagnet is stronger?

• A

• B

Multiple Choice

Which electromagnet is stronger?

• A

• B

Multiple Choice

Magnetism is a _________ force

• non-contact

• contact

• chemical

• biological

Multiple Choice

Look at this magnet. Which is the north pole?

• A

• B

Multiple Choice

Here are two magnetic materials.

Which one is currently unmagnetized?

• A

• B

Multiple Choice

If you place the North pole of a magnet next to the South pole of another magnet, they will:

• Attract
• Repel
• Do nothing
• Shatter

Poll

Did you feel building an electromagnet helped you learn how they work?

• YES

• NO

• Not Sure

Open Ended

In our activity we learned that you can make an electromagnet stronger by adding more coils around the iron core. What are two other ways you can create a stronger electromagnet?