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通常认为,右手定则判断感应电流方向的适用范围是:只适用于一段导体在磁场中做切割磁感应线运动的情况。笔者认为,通过两个简单的假设后,产生感应电流的任何情形中,感应电流的方向都可以用右手定则简便地进行判断,也即右手定则判断感应电流方向具有普遍性。实践于教学,深受学生欢迎。现介绍如下:一、两条假设1.假设无论何种线圈,电路均为一个弹性金属方框。2.假设通过弹性金属方框的磁通量增加时,
It is generally believed that the right-hand rule to determine the direction of the induction current is: only applies to a section of conductor in the magnetic field to do cut magnetic induction line movement situation. In my opinion, the direction of the induced current can be easily judged by the right-hand rule in any case where the induced current is generated by two simple hypotheses. That is, the right-hand rule determines the direction of the induced current is universal. Practice in teaching, welcomed by students. Are introduced as follows: First, two assumptions 1. Assuming no matter what kind of coil, the circuit is a flexible metal box. 2. Assuming that the flux through the flexible metal box increases,