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Question

In an A.C. circuit having resistance and capacitance :

A
emf leads ahead of the current
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B
current lags behind the emf
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C
both the current and emf are in phase
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D
current leads ahead of the emf
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Solution

The correct option is D current leads ahead of the emf

D

In circuits with primary capacitive loads current leads the voltage. This is because current must flow first to the two plates of the capacitor, where charge is stored. Capacitor is a voltage difference is thus dependent on the behavior current and on how much change it accumulates.


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