Move a bar magnet near one or two coils to make a light bulb glow.
在一两枚硬币附近移动磁棒来让灯泡发光。
The magnetic state of a bar magnet or a horseshoe magnet is extremely complicated.
条形磁铁或马蹄形磁铁的磁态是极其复杂的。
A bar on horseshoe magnet is called a permanent magnet.
棒形或马蹄形磁体称为永磁体。
If the bar magnet is simply held stationary near the coil, no current is indicated.
如果磁棒单纯静止在线圈附近，就检测不到电流。
If the bar magnet is simply held stationary near the coil, no current is indicated.
如果磁棒单纯静止在线圈附近，就检测不到电流。
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