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.

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.

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)) :-How doesthe reactance of the device Y vary with the frequency of the AC? Show graphically.

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 graphs showinh variation of emf and current with time over one cycle of AC for Y.

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.

A capacitor of 2 muF is connected to an AC source of emf e = 250 sin 100 pit . Write an equation for instantaneous current through the circuit and give reading of AC ammeter connected in the circuit.

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

Select and write the most appropriate answer. The instantaneous current in an A.C. circuit is given by I = 2 sin (omegat +theta) ampere. The r.m.s. value of the current is

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 inductance of 0.5 H,a capacitor of capacitance 10^-9 F and a resistance of 100 Omega are connected in series across A.C. source of e.m.f. 10 V.The current through the circuit at resonance is