The EMF induced in a circuit or loop consist of
two Types/methods either dynamically and statically induced EMF. Dynamically
induced EMF is used in DC Generators and the statically induced EMF is
used in transformers.
Dynamically
Induced EMF
Dynamically Induced EMF is defined as “The emf induced in a coil
due to relative motion of the conductor and the magnetic field”. In this
case, the magnetic field is fixed and the conductor moves and cuts the flux so
that the EMF is produced. DC generator works on the principle of dynamically
induced emf.
Statically
Induced EMF
Statically induced EMF is defined as “The emf induced in a coil
due to change of flux linked with it is called Statically Induced EMF.”
In this case, the conductor is fixed and the flux changes continuously. Transformer
is an example of statically induced emf. Here the windings are stationary and
the magnetic field is moving around the conductor and produces EMF. Statically
induced EMF is divided into mutually induced EMF and self-induced EMF.
Mutually Induced EMF
In this case of EMF Induction, if we place two coils nearly to
each other and one coil is connected to the supply and the other is not
connected to any source of current and it is connected with the voltmeter only.
When we give the supply to the first coil then it will produce a flux across it
and this flux starts linking to the other coil and as a result an EMF is
produced in the second coil without any electric connection. The EMF is only
produced in the second coil due to the flux linkage. It is also known as mutual
inductance.
Self - Induced EMF
In this case, when we change the value of the current in a coil
then the flux linked with the coil is changed and due to changing in flux
linkage of the coil an EMF is produced in it and this EMF is known as self-induced
EMF. It is also known as self-inductance
