**Mutual Inductance**is the basic operating

**principal**of the transformer, motors, generators and any other electrical component that interacts with another magnetic field. Then we can define

**mutual induction**as the current flowing in one coil that induces a voltage in an adjacent coil.

Subsequently, one may also ask, what is self and mutual inductance?

**Self inductance**is defined as the

**induction**of a voltage in a current-carrying wire when the current in the wire itself is changing. In the case of

**self**-

**inductance**, the magnetic field created by a changing current in the circuit itself induces a voltage in the same circuit. Therefore, the voltage is

**self**-induced.

What is the law of mutual induction?

**Mutual Inductance**. When an emf is produced in a coil because of the change in current in a coupled coil , the effect is called

**mutual inductance**. The emf is described by Faraday's

**law**and it's direction is always opposed the change in the magnetic field produced in it by the coupled coil (Lenz's

**law**).

Why the inductor is denoted by L?

It is customary to use the symbol

**L**for**inductance**, in honour of the physicist Heinrich Lenz. In the SI system, the measurement unit for**inductance**is the henry, with the unit symbol H, named in honor of Joseph Henry, who discovered**inductance**independently of, but not before, Faraday.