Similarly, moving a magnet creates an electric current in a neighbouring wire.
同样，移动磁体也可以使线圈中产生电流。
2
These prevent the central magnet from moving up and down smoothly.
这样可以避免线圈中央的磁铁上下移动的幅度过小。
3
A current can also be induced by constantly moving a permanent magnet in and out of a coil of wire or by constantly moving a conductor near a stationary permanent magnet.