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电磁感应中的感应电动势公式有三个,学生容易混淆,本文从电磁感应的本质出发找到三者间的区别和各自条件,并举例说明。
There are three formulas of EMF in EM induction. Students are confused easily. In this paper, we will find the differences among the three and their respective conditions from the essence of EM induction.