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在电磁感应现象中,由于引起磁通量变化的原因不同,产生感生电动势的机理也不同,一般分为两种:一种是磁场不变,导体运动引起磁通量变化而产生的感生电动势,即E=Blv。这种电动势叫动生电动势。另一种是导体不动,由于磁场变化引起磁通量变化而产生的感生电动势,即E=ΔΦΔt=ΔBΔt
In the electromagnetic induction phenomenon, due to the different causes of magnetic flux changes, the mechanism of induced electromotive force is also different, generally divided into two types: one is the magnetic field is unchanged, the induced electromotive force caused by the magnetic flux changes caused by conductor movement, that is, E =Blv. This electromotive force is called dynamic electromotive force. The other is that the conductor is not moving, the induced electromotive force due to magnetic flux changes caused by magnetic field changes, ie E = ΔΦ Δt = ΔB Δt