When a magnet is freely suspended it becomes a compass.
把一块磁铁随意地悬挂起来,它就会变成一个指南针。
The inverse effect also occurs: a spinning bar magnet will cause a suspended copper disk to rotate.
逆效应,也会发生:纺纱条形磁铁将导致暂停铜磁盘旋转。
The inverse effect also occurs: a spinning bar magnet will cause a suspended copper disk to rotate.
逆效应,也会发生:纺纱条形磁铁将导致暂停铜磁盘旋转。
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