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:-

  1. 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.

 

  1. 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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