Whenever a conductor is placed in a varying magnetic field, EMF is induced in the conductor and this EMF is called induced EMF.
Induced EMF is of two types
I. Dynamically induced EMF
When the conductor is in motion and the field is in stationary so the EMF is induced in the conductor, this type of EMF is called dynamically induced EMF.
II. Statically induced EMF
When the conductor is in stationary and the field is changing (varying) then in this case EMF is also induced in the conductor, which is called statically induced EMF.
Statically induced EMF is of two types
Self induced EMF
Mutually induced EMF
Self-induced EMF is that EMF which is induced in the conductor by changing in its own. When current is changing the magnetic field is also changing around the coil and hence Faraday law is applied here and EMF are induced in the coil to it self which called self induced EMF.
When an alternating voltage or current is applied to the coil 'a' alternating current will flow in the coil' a' and is a result of which a varying magnetic field will produced around the coil' a' .if we placed another coil 'b' in the field of coil 'a' then Faraday law is also applied here and EMF are induced in coil `b' this EMF is called mutually induced EMF.