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When an AC voltage of 220 V is applied t...

When an AC voltage of 220 V is applied to the capacitor C

A

the maximum voltage between plates is 220 V.

B

the current is in phase with the applied voltage.

C

the charge on the plate is not in phase with the applied voltage.

D

power delivered to the capacitor per cycle is zero.

Text Solution

Verified by Experts

The correct Answer is:
D
When an ac voltage of 220 V is applied to a capacitor C, the charge on the plates is in phase with the applied voltage. As the circuit is pure capacitive so, the current developed leads the applied voltage by a phase angle of `90^(@)` Hence, power delivered to the capacitor per cycle is
`P = V_("rms")I_("rms")cos 90^(@)=0`.
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Knowledge Check

  • A sinusoidal voltage of rms value 220 V is applied to a diode and a resistor R in the circuit shown in figure so that half wave rectification occurs. If the diode is ideal, what is the rms voltage across R_1 ?

    A
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    B
    110 V
    C
    `110sqrt2` V
    D
    `220sqrt2` V

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