The basic idea behind an electromagnet is extremely simple: By running electric current through a wire, you can create a magnetic field.

By using this simple principle, you can create all sorts of things, including motors, solenoids, read/write heads for hard disks and tape drives, speakers, and so on. In this article, you will learn exactly how electromagnets work. You will also have the chance to try several experiments with an electromagnet that you create yourself!

 

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