闭合回路的一部分导体做切割磁感线的运动,产生感应电动势,在回路中产生感应电流,而通有感应电流的导体在磁场中将受到安培力,安培力又将制约这部分导体的运动……这就是“动—电—动”问题.解题的一般步骤是:(1)用法拉第电磁感应定律求感应电动势 A part of the conductor in the closed loop cuts the motion of the magnetic induction line, generates an induced electromotive force, and induces a current in the loop. The conductor passing through the induced current will receive an amperage force in the magnetic field, and the Ampere force will restrict the movement of this part of the conductor... ...This is the problem of “moving-electricity-moving”. The general steps of problem solving are: (1) Using Faraday’s law of electromagnetic induction to find the induced electromotive force