When an alternating voltage of 220V is applied across a device X, a current of 0.5A
flows through the circuit and is in phase with the applied voltage. When the same
voltage is applied across another device Y the same current flows through the
circuit but it leads the applied voltage by /2 rad.
(a) Name the devices X and Y.
(b) Calculate the current flowing in the circuit when same voltage is applied across
the series combinations of X and Y.
v = 220 V
I = 0.5 A
1) X is resistor, Y is Capacitor
2) R = Xc as the same current is flowing in both cases.
When connected in series, net impedance= Z =
voltage applied is same
so current is : V/Z =220/622.25 = 0.35355 Ampere