Background Information
An electromagnet is a strong temporary magnet made by inserting an iron core into a wire coil and passing an electric current through the wire.
Go to: http://www.howstuffworks.com/electromagnet.htm
Study the content on the page and answer the following questions.
What is the basic idea behind an electromagnet?
What sort of things can you create with electromagnets?
Click “Next” at the bottom right, read the article and answer the following questions.
What is the fundamental law of all magnets?
Compare and contrast a normal magnet and an electromagnet.
Click “Next” at the bottom right, read the article and answer the following questions.
An electromagnet starts with a _________________ (or some other
source of power) and a wire. What a battery produces is
_____________________.
Explain how an electron flows in an electromagnet.
What is the basis of an electromagnet?
Click “Next” at the bottom right, read the article and answer the following question.
Explain why the compass needle swings away from the north when placed near an electromagnet. What is affecting the compass?
Click “Next” at the bottom right, read the article and answer the following question.
Hypothesize how you can increase the magnetic field of an electromagnet. Explain why this method works.
Go to: http://www.fossweb.com/modules3-6
Follow the links for electricity and magnetism until you get to the electromagnet game.
Read the instructions then start the game!
Fill in the following blanks with the values that enabled your magnet to lift all 75 shavings.
Wire Gauge___________ Wire Type___________ #of Winds_________
Power Supply: AC or DC #of Volts ___________
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