Magnet

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Revision as of 19:41, 10 October 2018 by Jnc (talk | contribs) (Jnc moved page Permanent magnet to Magnet: Cover all of them)
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A permanent magnet is a block of material in which the spin of electrons in the atoms of the material have been lined up. Since moving electric charges can have an effect on the magnetic field, the material becomes the source of a magnetic field. (Normally the spins of the electrons are random, and so they all cancel each other's field out.)