NEET Physics Alternating Current Questions Solved

A device 'X' is connected to an ac source V =V0 sin wt. 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 impendance vary with frequency of the ac source ?

show graphically.

 (d) Obtain an expression for the current in the circuit and its phase relation with ac voltage.

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