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  • A small signal voltage V(t) = V0 sin t is applied across an ideal c

A small signal voltage V(t) = V0 sin \omegat is applied across an ideal capacitor C :

Option: 1

Current I(t), lags voltage V(t) by 90o.


Option: 2

Over a full cycle the capacitor C does not consume any energy from the voltage source.


Option: 3

Current I(t) is in phase with voltage V(t).


Option: 4

Current I(t) leads voltage V(t) by 180o.


Answers (1)

best_answer

When an ideal capacitor is connected with an ac voltage source, current leads voltage by 90°. Since, energy stored in capacitor during charging is spent in maintaining charge on the capacitor during discharging. Hence over a full cycle the capacitor does not consume any energy from the voltage source.

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chirag

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