In the following circuit the current is in phase with the applied voltage. Therefore, the current in the circuit and the frequency of the source voltage respectively, are

Prove that in a pure resistive circuit the current is in phase with the applied voltage.

(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.

In LR circuit (shown in figure), current is lagging by pi/3 in phase with applied voltage, then select correct alternative:

In LR circuit (shown in figure), current is lagging by pi/3 in phase with applied voltage, then select correct alternative:

An ac source is connected in series with an inductor of 5H and a resistor of 1000Omega . The rms value of voltage of the source is 100 V and the frequency of the source is 50cps. What is the rms value of the current in the circuit? What is the phase difference of the voltage and the current in the circuit? What is the power dissipated in the circuit?

In a LCR series circuit, if the phase difference between applied voltage and current is zero then