Difference between revisions of "Magnet"
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Revision as of 20:41, 10 October 2018
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.)
