Alternating Current

Related Questions

• The phase angle between e.m.f. and current in LCR series ac circuit is

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• The r.m.s. voltage of domestic electricity supply is 220 volt . Electrical appliances should be designed to withstand an instantaneous voltage of

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• A resistance of 20 ohms is connected to a source of an alternating potential $V = 220\sin (100\pi t)$. The time taken by the current to change from its peak value to r.m.s value is

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• The coefficient of induction of a choke coil is $0.1H$ and resistance is $12\,\Omega $. If it is connected to an alternating current source of frequency $60 Hz$, then power factor will be

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• The ratio of peak value and r.m.s value of an alternating current is

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