Magnet

How magnets work

Magnets are used for many things like a play ground like a pole, and a slide and many more. Magnets attract iron some times it repels on some pole. In the computers there so much iron. magnetic field is a region around a magnetic material or a moving electric charge. within witch force of magnetism act. There for it is very important because that how electronics work.
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The Science Behind Magnets: How do they Work? - Stuff to Blow Your Kids' Mind