an alternative voltage is applied across a circuit as a result a current i flows in it then power is

An alternating voltage V = V_(0) sin omegat is applied across a circuit. As a result, a current I = I_(0) sin (omegat – p/2) flows in it. The power consumed per cycle is

When an alternating voltage of 220 V is applied across a device P , a current of 0.25 A flows through the circuit and it leads the applied voltage by a angle pi/2 radian. When the same voltage source is connected across another device Q , the same current is observed in the circuit but in phase with the applied voltage. What is the current when the same source is connected across a series combination of P and Q ?

If an alternating voltage is applied across a diode in series with a load, then

A 60 Hz AC voltage of 160 V impressed across an LR-circuit results in a current of 2A. If the power dissipation is 200 W, calculate the maximum value of the back emf (in volt) arising in the inductance.

A circuit contains resistance R and an inductance L in series. An alternating voltage V=V_0sinomegat is applied across it. The currents in R and L respectively will be .

An alternating voltage E=E_0 sin omega t , is applied across a coil of inductor L. The current flowing through the circuit at any instant is

An rms voltage of 110V is applied across a series circuit having a resistance 11Ω and an impedance 22 Ω. The power consumed is