A resistro R and an element X are connected in series to a.c. source of voltage. The voltage is found to lead the current in phase by `pi//4`. If X is replaced by another element Y, the voltage lags behind the current by `pi//4`. Identify elements X and Y. when both X and Y are connected in series with R, to the same, will the power dissipated in the circuit be maximum of minimum ? Justify you answer.

When a 60 mH inductor and a resistor are connected in series with an AC voltage source, the voltage leads the current by 60°. If the inductor is replaced by a 0.5 uF capacitor, the voltage lags behind the current by 30°. What is the frequency of the AC supply ?

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 .

You are given three circuits X, Y and Z when the element X is connected across an a.c. source of a given voltage, the current and voltage are in same phase. When element Y is connected in series with X across the source, voltage is ahead of voltage by pi//4 . But the current is ahead of voltage by pi//4 , when Z is connected series with X, across the source. Identify the circuit elements X, Y and Z. When all the three elements are connected in series across the same source, determine the impedance of the circuit . Draw a plot of current versus the frequency of applied source and mention the significance of this plot.

A resistor R , an inductor L and a capacitor C are connected in series to a source of frequency n . If the resonant frequency is n_(r) , then the current lags behind voltage when

In an a.c. circuit, with phase voltage V and current I, the power dissipated is

In an a.c circuit with phase voltage V and current I, the power dissipated is

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 resistor R , an inductor L and a capacitor C are connected in series to an oscillator of frequency n . If the resonant frequency is n_r, then the current lags behind voltage, when