1.

Assertion : No power loss associated with pure capacitor in ac circuit. Reason : No current is flowing in this circuit.

Answer»

If both ASSERTION and reason are true and reason is the CORRECT explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but REASONB is false
If both assertion and reason are false.

Solution :Assertion is true but reason is false.
Assertion is true. When a capacitor is connected to an a.c. circuit, `epsilon+(rms)=i_(rms)((1)/(C omega))` where `(1)/(C omega)` is the impedance DUE to capacitative resistance. The power consumed in this circuit is zero because the phase difference `phi` between emf and current in a pure capacitance a.c. circuit is `(pi)/(2)`. Power factor cos`phi = 0`. It is only for d.c. that a current does not flow. Reason is false.


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