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The self inductance of the motor of an electric fan is 10H. In order to impart maximum power at 50 Hz, it should be connected to a capacitance ofA. `4 mu F`B. `2 mu F`C. `8 mu F`D. `1 mu F` |
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Answer» Correct Answer - D For maximum power, `L omega = 1/(C omega)` `:. C = 1/(L omega^(2)) = (1)/(L cdot 4 pi^(2)n^(2))` `= (1)/(10 xx 4 xx 10 xx 2500) [pi^(2)-:10 and n=50]` `:. C = 1/(10^6) = 10^(-6)F = 1 mu F`. |
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