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Question

An ac generator consists of a coil of 200 turns, 100 cm in diameter. If the coil rotates at 500 rpm in a magnetic field of 0.25T, then the maximum induced emf

A
20.6 V
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B
51.7 V
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C
4.1 V
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D
None of the above
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Solution

The correct option is C None of the above
emf= rate of change of flux

=N×area×B×ω

=200×π0.52×0.25×500×2π/60

=2056.17V

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