In this tutorial we are going to learn about what is Inductor & How it Use?

**Inductor – **

- It is a passive electrical components which is a coil of wire that is designed to take advantage of the relationship between magnetism and electricity as a result of an electric current passing through the coil.

- It is also called chock , that is another passive type electrical component which is a coil of wire designed to take advantage of this relationship by inducing a magnetic field in itself or within its core as when the current flowing through the wire coil. Generally a wire coil into an inductor results in a much stronger magnetic field than one that would be produced by a simple of wire.

- Inductor are made of wire tightly wrapped that is around a solid central core which can be either a straight cylindrical rod or a continues loop or ring to concentrate their magnetic flux.

**Below is symbol of Inductor**

**Working of Inductor**

When current I that flows though an inductor produce a magnetic flux that is proportional to it. But capacitor which opposes a change of voltage across their plate, an inductor opposes the rate of change current flowing through it due to the buildup of self – induced energy within magnetic.

We can say inductor oppose changes of current but will easily pass a steady state DC current. This ability of an inductor to oppose changes in current and which also relate to current.

Inductor measure in Henry

**Matual Inductance**

As per below image matual inductance is the interaction of one coils magnetic field on another coil as it induce a voltage in the adjacent coil.

Matual Inductance between Coils

M = √L1L2 H

**Here is taking example of Inductor circuit **

**LR Series Circuit**

- Generally all Coils, Inductors, Chokes and Transformers create a magnetic field around themselves consist of an inductance in series with a resistance forming an LR series circuit.
- Through Kirchhoff’s voltage law we can check individual voltage drops that exit around the circuit and then we can get flow of current in circuit.

As per Kirchhoff’s law:

V_{T }– (V_{R }+
V_{L }) = 0

The voltage drop across the resistor, R

V_{R }= IXR

The voltage drop across the inductor, L is

V_{L }= Ldi/dt

Now individual voltage drops around the LR series circuit as per below .

V_{T } = IXR + Ldi/dt

It can see that the voltage drop across the resistor depends upon the current , i while the voltage drop across the inductor depends upon the rate of change of the current , di/dt when the current is equal to zero, at time t = 0