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Compared with ordinary magnet electromagnet have what similarities and differences? _ ndfeb strong magnet manufacturers

by:Newland     2020-03-30
Tell you electromagnet about similarities and differences compared with ordinary magnet? Compared with ordinary magnet electromagnet have what similarities and differences? Similarities: there are magnetic, north and south poles, like poles repel, heteropolar attraction. Difference: permanent magnet magnetic, electromagnet has magnetic, electric power, no magnetic, magnetic poles position cannot be changed, magnet polarity can be changed, and the size of magnet magnetic constant, magnet magnetic size can change, the magnet is simple to use and electromagnet used trouble, magnet coil, electromagnet coil.
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