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众所周知,楞次定律可用图1所示装置来验证.当条形磁铁的一端在靠近闭合铝环A的圆心时,铝环被推斥;在离开闭合铝环的圆心时,铝环又被吸引.而把磁铁靠近或离开开口铝环B的圆心时,铝环不动.当然,实验中可能会发现,当磁铁靠近或离开开口铝环B时,铝环有轻微转动,对此,通常的解释是:移动磁铁时引起了空气流动,从而使铝环转动。
As we all know, the Lenz’s law can be verified by the device shown in Fig. 1. When one end of the bar magnet is close to the center of the closed aluminum ring A, the aluminum ring is repelled; when leaving the center of the closed aluminum ring, the aluminum ring is attracted again. When the magnet is near or away from the center of the opening aluminum ring B, the aluminum ring does not move. Of course, the experiment may find that when the magnet moves closer to or away from the opening aluminum ring B, the aluminum ring rotates slightly, which is usually The explanation is: When the magnet is moved, it causes air to flow, causing the aluminum ring to rotate.