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`?

(a) Draw graphs showing the variations of inductive reactnace and capacitive reactance with frequency of the applied ac source . (b) Draw the phasor diagram for a series RC circuit connected to an ac source. (c ) An alternating voltage of 220 V is applied across a device X , a current of 0.25 A flows , which lag behind the applied voltage in phase by (pi)/(2) radian . If the same voltage is applied across another device Y , the same current flows but now it is in phase with the applied voltage . (i) Name the devices X and Y. (ii) Calculate the current flowing in the circuit when the same voltage is applied across the series combination of X and Y.

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 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

When a circuit element X is conneted across a.c. sourceof emf 220sqrt2V , a current sqrt2 A flows through it and this current is in phase with applied voltage. When another element Y is connected across same a.c. source, the same current flows in the circuit, but it leads the voltages by pi//2. Find current that flows in the circuit when series combination of X and Y is connected acorss same a.c. voltage.

When a circuit element X is conneted across a.c. sourceof emf 220sqrt2V , a current sqrt2 A flows through it and this current is in phase with applied voltage. When another element Y is connected across same a.c. source, the same current flows in the circuit, but it leads the voltages by pi//2. Name the circuit elements X and Y.

An LCR-circuit is connected to a source of a.c. current under resonant condition. The phase difference between the applied voltage and the current it the circuit is

When a circuit element X is conneted across a.c. source, a current sqrt2 A flows through it and this current is in phase with applied voltage. When another element Y is connected across same a.c. source, the same current flows in the circuit, but it leads the voltages by pi//2 . Name the circuit elements X and Y. Find current that flows in the circuit when series combination of X and Y is connected acorss same a.c. voltage. Plot a graph showing variation of net impedance of series combination of X and Y as a function of angular frequency of applied voltage.