When an electric device X is connected to a 220 volt, 50 hertz a.c. supply, the current is 0.5 amp, and is in same phase as the applied voltage. When another device Y is connected to the same supply, the electric current is again 0.5amp, but it leads the potential difference by `pi//2` (i) What are the devices X and Y ? (ii) When X and Y are connected in serices across the same source, what will be the current ?

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.

An electric bulb is connected to a 220V power supply line. If the bulb draws a current of 0.5A, calculate the power of the bulb.

A 44 mH inductor is connected to 220 V, 50 Hz a.c. supply. Determine rms value of current in the circuit.

An electric heater is connected to the voltage supply. After few seconds Current gets its steady value then its initial current will be

When a circuit element X is connected across on a.c. source of e.m.f. 220 sqrt2 volt, current of sqrt2 A flows through it in phase with the voltage. When another element Y is connected across the same a.c. source, the same current flows through the circuit, but it leads the voltage by pi//2 radian. Name the circuit element X and Y. Find the current that flows in the circuit when series combination of X and Y is connected across the same source.

A pure resistive circuit element X when connected to an ac supply of peak voltage 200 V gives a peak current of 5 A which is in phase with the voltage. A second circuit element Y, when connected to the same ac supply also gives the same value of peak current but the current lags behind by 90^(@) . If the series combination of X and Y is connected to the same suply, what will be the rms value of current?

A pure resistive circuit element X when connected peak current of 5 A which is in phase with the voltage. A second circuit element Y , when connected to the same AC supply also gives the same value of peak current but the current lags behind by 90^(@) . If the series combination of X and Y is connected to the same supply, what will be the rms value of current ?

Give three elements X, Y and Z to be connected across an ac source . With only X connected across the ac source voltage and current are found to be in the same phase . With only element Y in the circuit the voltage lage behind the current in phase by pi//2 while with the element Z in the circuit the voltage leads the current in phase by pi//2 . (a) Identify the elements X, Y and Z . (b) When all these elements are connected in series across the same source (i) determine the power factor and (ii) find out the condition when the circuit is in resonant state .

When a voltage measuring device is connected to a.c. mains the meter shows the steady input voltage of 220 V . This means