Rankers Physics

Faraday's Law of Electromagnetic Induction: Practice Problem & Solution

In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency ω in a magnetic field B. The maximum value of emf generated in the coil is :
N.A.B.R.
N.A.B.ω
N.A.B.R.ω
N.A.B.

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Similar Practice Questions

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1. A conducting circular loop is placed in a uniform magnetic field of inducting B tesla with its plane normal to the field. Now, radius of the loop starts shrinking at the rate (dr/dt). Then the induced e.m.f. at the instant when the radius is r is :
2. Assertion (A): Change in magnetic flux w.r.t. time produces an induced emf. Reason (R): Faraday established induced emf experimentally.  
3. A rectangular coil ABCD is rotated anticlockwise with a uniform angular velocity about the axis shown in diagram below. The axis of rotation of the coil as well as the magnetic field B are horizontal. The induced e.m.f. in the coil would be maximum when
4. Assertion (A): At any instant, if the current through an inductor is zero, then the induced emf may not be zero. Reason (R): An inductor tends to keep the flux constant.  
5. Assertion (A): Only a change of magnetic flux with time, will maintain an induced current in the coil. Reason (R): The presence of a large magnetic flux will maintain an induced current in the coil.