In an a. c. circuit, the instantaneous e.m.f. and current are given by e = 100 sin 30 t i = 20 sin 3

Question

In an a. c. circuit, the instantaneous e.m.f. and current are given by

e = 100 sin 30 t
i = 20 sin $(30 t - \frac{π}{4})$

In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively.

Accepted Answer

Pavg = Vrms Irms cosÎ¸ =V02I02cosÎ¸ =1002202cosÂ 45o =10002Â watt wattless current = Irms sinÎ¸ =I02Â sinÂ Î¸ =202Â sinÂ 45o = 10 amp.

Question