An electrical element X when connected to an alternating voltage source has current through it leading the voltage by `pi/2` radian. Identify X and write an expression for its reactance.

In a circuit L,Cand R are connected in series with an alternating voltage of frequency f the current leads the voltage by 45^@. The value of C is

A device Y is connected across an AC source of emf e = e_osinomegat .the current through y is given as i = i _osin(omegat+(pi/2)) :-Identify the device Y and write the expression for its reactance.

Two resistances 2 ohm and 3 ohm are connected across the two gaps of the metre bridge as shown in the figure .Calculate the current through the cell when the bridge is balanced and the specific resistance of the material of the metre bridge wire. Given the resistance of the bridge wire is 1.49 ohm and its diameter is 0.12 cm.

An AC source generating a voltage e = e_0 sin omega t is connected to a capacitor of capacitance C. Find the expression for the current i flowing through it. Plot a graph of e and i versus omega t .

An alternating voltage given by e=140 sin 3142t is connected across a pure resistor of 50 Omega .Find:- the rms current through the resistor.

A device Y is connected across an AC source of emf e = e_osinomegat .the current through y is given as i = i _osin(omegat+(pi/2)) :-Draw the phasor diagram for the device Y.

Choose the correct alternati e and write it along its allotted alphabet: When a resistor of 2 Omega is connected to a cell of negligible internal resistance, the current through 2 Omega is 1 A. If another resistor of 8 Omega is connected in series with the first onw, then the current through 2 Omega will be about.......... A. 1 A B. 0.25 A C. 0.2 A D. 10 A