Alternating Current

Related Questions

• If a current I given by ${I_0}\sin \,\left( {\omega \,t - \frac{\pi }{2}} \right)$ flows in an ac circuit across which an ac potential of $E = {E_0}\sin \omega \,t$ has been applied, then the power consumption P in the circuit will be

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• In a L-R circuit, the value of $L$ is $\left( {\frac{{0.4}}{\pi }} \right)\;henry$ and the value of $R$ is $30$ ohm. If in the circuit, an alternating e.m.f. of $200$ volt at $50$ cycles per sec is connected, the impedance of the circuit and current will be

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• A coil has $L = 0.04 H$ and $R = 12\,\Omega $. When it is connected to $220V$, $50H$z supply the current flowing through the coil, in amperes is

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• An alternating voltage $E = 200\sqrt 2 \sin (100\,t)$ is connected to a 1 microfarad capacitor through an ac ammeter. The reading of the ammeter shall be

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• A $40 \Omega$ electric heater is connected to a 200 V, 50 Hz mains supply. The peak value of electric current flowing in the circuit is approximately

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