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A device X' is connectedofto an ac source V - Vg sin cot. The variationin one cycle is shown in the following graphac source02π(a) Identify the device 'X.Which of the curves A, B and C represent the voltage, current andthe power consumed in the circuit ? Justify your answer.(b)How does its impedance vary with frequency of the ac source ?Show graphically.(c)(d) Obtainan expression for the current in the circuit and its phaserelation with ac voltage. |
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Answer» The device X is a capacitorCurve A: Power consumed in the circuitCurve B: VoltageCurve C: Current (because current leads the voltage in capacitive circuit |
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