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A device 'X' is connected to an ac sourc...

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.

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