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在“电磁感应”的教学中,关于感应电动势的产生,通常由于引起闭合导体回路中磁通量发生变化的方式有两种,所以感应电动势可分为两种类型,一是磁场不变,导体在运动;二是导体不动,磁场在变化。由前一种原因产生的感应电动势称为动生电动势,后种原因产生的感应电动势称为感生电动势。感生电动势是由于变化的磁场在它周围所激发的电场(涡旋电场)作用于导体中的自由电子所产生的,它的大小等于作用于单位电荷绕导体回路
In the teaching of “electromagnetic induction”, the generation of induced electromotive force is usually due to two ways of causing the magnetic flux in the closed conductor circuit to change, so the induced electromotive force can be divided into two types. The first is that the magnetic field is constant and the conductor is In motion; the second is the conductor does not move, the magnetic field is changing. The induced electromotive force generated by the former causes is called dynamic electromotive force. The induced electromotive force generated by the latter type of cause is called induced electromotive force. Induced electromotive force is due to the fact that a changing magnetic field acts on the free electrons in the conductor by the electric field (vortex electric field) excited around it, and its size is equal to the unit of charge applied to the conductor loop.