Home Physics Semiconductor Electronics All Topic Question for Revision Test An ac source (sinusoidal source with frequen…
Physics Semiconductor Electronics All Topic Question for Revision Test MCQ (Single Correct)

An ac source (sinusoidal source with frequency 50 Hz) is connected in series with a rectifying diode, a 100 Ω Ω resistor, a 1000 µF capacitor and milliammeter. After some time the milliammeter reads zero. The voltage measured across the capacitor with a dc voltmeter is

A
the peak voltage of the ac source
B
rms voltage of the ac source
C
average voltage of the ac source over a half cycle
D
average voltage of the ac source over a full cycle.

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The correct answer is:
C

In this state the circuit will work as half wave rectifier and the voltage across capacitor will be equal to average value of voltage of ac source over a half cycle.

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