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In a purely capacitive ac circuit, the v...

In a purely capacitive ac circuit, the value of current is:

A

`i_(m) sin ( omegat + (pi)/(4))`

B

`i_(m) cos (omegat + (pi)/(2))`

C

`i_(m) sin (omega t + (pi)/(2))`

D

`i_(m) cos ( omegat + (pi)/(4))`

Text Solution

Verified by Experts

The correct Answer is:
C
The value of current in pure capacitive ac circuit is given by `i_(m) sin(omegat + (pi)/(2))` .
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Knowledge Check

  • In a purely capacitive circuit, the current

    A
    lead the applied emf by `pi//2`
    B
    lags behind of applied emf by `pi//2`
    C
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    D
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    B
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    Leads the e.m.f. in phase
    D
    Leads the e.m.f. in half the cycle and lags behind it in the other half

  • Assertion : In a purely inductive or capacitive circuit, the current is referred to as wattless currents. Reason : No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

    A
    If both assertion ans reason are true ans reaason is the correct explanation of assertion.
    B
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    C
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    D
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