What is an electromagnet?How can you make an electromagnet?

An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity.
It is fairly easy to build an electromagnet. All you need to do is wrap some insulatedcopperwire around anironcore. If you attach a battery to the wire, an electric current will begin to flow and the iron core will become magnetized. When the battery is disconnected, the iron core will lose its magnetism.

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Apoorva Arora

IIT Roorkee

askIITians Faculty