Question

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(a) N.A.B.R.ω(b) N.A.B(c) N.A.B.R(d) N.A.B.ω

Answer 1

Hola User

d} N.A.B.ω

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Answer 2

Answer:

D) NABω.

Explanation:

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 emf generated will be maximum when flux (cutting) will be maximum. This means that the angle between area vector of coil and magnetic field is 0°. The emf generated is given by as a function of time -

e = NBAωcosωt = NBAωcosθ

= emax=NABω

Thus, the maximum value of emf generated in the coil is NABω.