验证开口铝环运动的可靠方法

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如图1所示,将条形磁铁插入或抽出楞决定律演示仪的开口铝环B时,可观察到B环会 As shown in Figure 1, when inserting or extracting a bar magnet into the opening aluminum ring B of the decisive demonstrator, it can be observed that the B ring will
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