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

Question

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

MARKS App · Accepted Answer

The emf generated would be maximum when flux (cutting) would be maximum i e , angle between area vector of coil and magnetic field is 0 ° . The emf generated is given by [as a function of time] e = N B A ω cos ⁡ ω t ⇒ e m a x = N A B ω

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