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Electromagnetic Induction

Question
CBSEENPH12039698

The self inductance of the motor of an electric fan is 10 H. In order to impart maximum power at 50 Hz, it should be connected to a capacitance of

  • 4µF

  • 8µF

  • 1µF

  • 2µF

Solution

C.

1µF

straight f space equals space fraction numerator 1 over denominator 2 straight pi square root of LC end fraction
space straight C space equals space fraction numerator 1 over denominator 4 space xπ squared straight f squared space straight x space 10 end fraction
straight C space equals space 1 μF

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