A device .X. is connected to an ac source V= `V_(o)sinomegat`. The variation of voltage, current and power in one complete cycle is shown in the following figure.
(i) Which curve shows power consumption over a full cycle ?
(ii) Identify the device .X..

A device 'X' is connected to an AC source. The variation of voltage, current and power in one complete cycle is shown in figure. a) Which curve shows power consumption over a full cycle? b) What is the average power consumption over a cycle? c) Identify the device X.

A device 'X' is connected to an ac source V = V_(0) sin omegat . The variation of voltage, current and power in one cycle is shown in the following graph: (a) Identify the device 'X' (b) Which of the curves A,B and C represent the voltage , current and the power consumed in the circuit ? Justify your answer. (c) How does its impedance wary with frequency of the source ? (d) Obtain an expression for the current in the circuit and its phase relation with ac voltage.

The variation of current (I) and voltage (V) is as shown in figure A . The variation of power P with current I is best shown by which of the following graph

For one complete cycle of a thermodynamic process gas as shown in the P-V diagram, which of following correct?

A 10 ohm resistor is conneted to a supply voltage alternating between +4V and -2V as shown in the following graph. The average power dissipated in the resistor per cycle is

A 100 Omega resistor is connected to a 220 V, 50 Hz ac supply. (a) What is the rms value of current in the circuit? (b) What is the net power consumed over a full cycle?

A 100 Omega resistor is connected to a 220 V, 50 Hz ac supply. (a) What is the rms value of current in the circuit? (b) What is the net power consumed over a full cycle?

A device X is connected across an ac source of voltage V = V_(0) sin omegat . The current throught X is given as I= I_(0)sin(omegat + (pi)/(2)) (a) Identify the device X and write the expression for its reactance. (b) Draw graph showing variation of voltage and current with time over one cycle of ac, for X. How does the reactance of the device X vary with frequency of the ac? Show this variation graphically. (d) Draw the phasor diagram for the device X.

Answer the following: (i) When an AC source is connected to an ideal inductor show that the average power supplied by the source every complete cycle is zero. (ii) A lamp is connected in series with an inductor and an AC source. What happens to the brightness of the lamp when the key is plugged in and an iron rod is inserted in the inducutor ? Explain.

An ac source of voltage V=V_(m)sin omega t is connected across the resistance R as shown in figure. The phase relation between current and voltage for this circuit is