感应电动势分为两种,即由于磁场发生变化而产生的感生电动势和由于导体切割磁感线而产生的动生电动势．这两种感应电动势产生的原因不同,感生电动势是因为变化的磁场周围产生电场而产生的,而动生电动势是因为导体切割磁感线的运动使自由电荷受到洛仑兹力作用而产生的．电路中如果既有磁场发生变化又有导体切割磁感线,应同时考虑这两种感应 The induced electromotive force is divided into two types, namely the induced electromotive force due to the change of the magnetic field and the electromotive force generated by the conductor cutting the magnetic induction line. These two kinds of induced electromotive force are produced for different reasons. The induced electromotive force is generated by the electric field generated around the changing magnetic field. The electromotive force is generated by the action of the conductor cutting the magnetic induction line and causing the free charge to be subjected to the Lorentz force. . In the circuit, if both the magnetic field changes and the conductor cuts the magnetic induction line, the two inductions should be considered at the same time.