Electromagnets

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An electromagnet is a magnet that you can turn off and on. Do you know the difference between a permanent magnet and an electromagnet? Well, they are very different because a permanent magnet is always a magnet. An electromagnet is a magnet that can be turned into a attractable magnet and a intractable magnet.

Do you have a doorbell? If you do, then you might have an electromagnet doorbell. When a person presses a button to activate the door bell, then the doorbell will ring. The doorbell rings because when the button goes down, it will close a circuit. That will cause a metal part to move back, and when the circuit is open, then the metal part will sling to the bell.

(Johnson April 1, 2009)

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