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Electromagnetic Induction

Magnetic flux linked with a surface:

  • It is ​the number of magnetic lines of force crossing a surface.

  • Flux linked with a surface of area A placed in a magnetic field B, capital phi equals B with rightwards arrow on top. A with rightwards arrow on top equals space B A space cos space theta.

  • SI unit of flux is Weber.

​Faraday's Laws

  • First Law − Whenever the amount of magnetic flux linked with a circuit changes, an emf is induced in the circuit. The induced emf lasts as long as the change in magnetic flux continues.

  • Second Law − The magnitude of emf induced in a ci…

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