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How to change iron into a magnet

by:Newland     2020-04-28
(1) in the lab has a machine can produce strong magnetic field, when the magnetic weakening magnet put into the inside will be magnetized (2) the iron around the outer conductor, wires in the closed circuit becomes a magnet and a magnetic (3) will be in contact with the object has been magnetized iron, oneself will be magnetized, the magnet grinding nails with a magnet it is for this reason the WWW. yirongciye。 Com/magnet, powerful magnets, magnet manufacturer, special-shaped magnet
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