A circular coil of N turns and radius R is kept normal to a magnetic field given by B=BoCoswt. Deduce an expression for emf induced in this coil. State the rule which helps to detect the direction of induced current?

Asked by Mrinal | 25th Dec, 2012, 07:12: PM

Expert Answer:

Area of the coil, A = ?r2

Magnetic field of the coil, B = Bocos?t

=> Magnetic flux linked with the coil, ? = NB.A

=> ? = NBA cos0

=> ? = NBA

Induced emf, e = - d?/dt = ?NABosin?t

Fleming’s right hand rule helps to detect the direction of induced current.

Answered by  | 25th Dec, 2012, 10:25: PM

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