Questions
A small signal voltage is applied across an ideal capacitor C
a
Current I(t) is in phase with voltage V(t)
b
Current I(t) leads voltage V(t) by 180°.
c
Current I(t) , lags voltage V(t) by 90° .
d
Over a full cycle the capacitor C does not consume any energy from the voltage source.
detailed solution
Correct option is D
(4): When an ideal capacitor is connected with an ac voltage source, current leads voltage by 900 . 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.Talk to our academic expert!
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