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不少学生在学习了法拉第电磁感应定律后,对电磁感应现象中的某些问题表示困惑,今针对他们的困惑做如下说明。一、没有构成回路的导体棒做切割磁感线运动却产生感应电动势要回答这一问题,应从产生感应电动势的机理来说明,即在磁场中做切割磁感线运动的金属导体,是由做热振动的正离子和做无规则运动热运动、带负电的自由电子组成的,由于该导体相对磁场运动,使之内部的电荷也相对磁场
Many students after studying the Faraday’s law of electromagnetic induction, confused some of the problems in the phenomenon of electromagnetic induction, the following description of their confusion. First, did not form a loop conductor rod to do cut magnetic induction line movement but the induction electromotive force To answer this question should be generated from the induced electromotive force mechanism to do that in the magnetic field to do cutting magnetic induction line movement of the metal conductor is done Thermal vibration of the positive ions and do random sports thermal movement, negatively charged free electrons, due to the conductor relative to the magnetic field movement, so that the internal charge is also relative to the magnetic field