kx 发帖数: 16384 | 1 永久磁铁能够人工生产么?断电也能一直有磁性的那种
电磁铁断电后的那点剩磁,能维持多久? |
f******h 发帖数: 609 | 2 Sure, NdFeB is the most common permanent magnet and can be man-made.
Electomagnet uses soft cores with little remanent field, but the small field
will last very long after cut off elecltricity.
永久磁铁能够人工生产么?断电也能一直有磁性的那种
电磁铁断电后的那点剩磁,能维持多久? |
kx 发帖数: 16384 | 3 谢!
field
【在 f******h 的大作中提到】![](/moin_static193/solenoid/img/up.png) : Sure, NdFeB is the most common permanent magnet and can be man-made. : Electomagnet uses soft cores with little remanent field, but the small field : will last very long after cut off elecltricity. : 永久磁铁能够人工生产么?断电也能一直有磁性的那种 : 电磁铁断电后的那点剩磁,能维持多久?
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s***i 发帖数: 600 | 4 ebay上一大堆卖的。
【在 kx 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 永久磁铁能够人工生产么?断电也能一直有磁性的那种 : 电磁铁断电后的那点剩磁,能维持多久?
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