Question

what is a magnet where we use

Answer 1

A magnet is anything that carries a static magnetic field around with it. There are lots of kinds of magnets.

magnets, both permanent and electro-magnetic, are about the only way to convert electricity to a physical motion. If you want move something using electricity, a magnet will be involved, like Speakers and other electronic goods.

Answer 2

magnet is a device which attract the iron. it can be used in finding the direction. N and S because it has 2 end poles