1.The bottom part of the hanging wire is placed between the poles of a small horseshoe magnet.
悬挂着的导线下端放在一个小型马蹄形磁铁的两个磁极之间。
2.These eddy currents are in such a direction as to cause the disk to follow the rotation of the horseshoe magnet.
这些涡旋电流的方向能够引起圆盘跟随马蹄形磁铁旋转。
3.A bar on horseshoe magnet is called a permanent magnet.
棒形或马蹄形磁体称为永磁体。
4.Whenthe horseshoe magnet is rotated, the moving magnetic field passing across the copper disk induces eddy currents in the disk.
当马蹄铁磁铁旋转时，穿过铜圆盘的移动磁场在盘中感应出涡旋电流。