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Electromagnetic Induction

Which one of ...

Question

Which one of the following can produce maximum induced emf?

A

50 ampere dc

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B

50 ampere 50 Hz ac

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C

50 ampere 500 Hz ac

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D

100 ampere dc

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Solution

The correct option is C 50 ampere 500 Hz ac
induced emf is $e = L \frac{d i}{d t}$
so with higher frequency $\frac{d i}{d t}$ will be greater.

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