Class 12 Physics Electromagnetic Induction | Induction |

**Induction**

Induction is defined as current production in the coil due to the change in magnetic flux in itself or another coil.

Types of Induction:-

- Self-induction-

- There will be change in the magnetic flux in the coil itself because of which a current will be induced in itself.
- It is denoted by L.

- Mutual induction-

- There are 2 coils,if there is change in the magnetic flux in one coil then the magnetic field is induced in the second coil.
- It is denoted by M.

__Inductance:-__

- Inductance is a quantity which measures the induction.
- It is also called as Coefficient of induction.
- Coefficient of inductionis about the ratio of current induced with respect to magnetic flux.
- Flux through the coil Φ∝ I (current)
- If there are N turns in the coil,
- Total Flux is known as flux linkage NΦ∝ I=> NΦ =constant I
- This constant of proportionality is known as
**Inductance**. - It is a scalar quantity.
- I. unit is Henry(H).
- It depends on
- Geometry of the coil.
- Nature of the material on which it is wound.

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