Question

Assertion : No power loss associated with pure capacitor in ac circuit.

Reason : No current is flowing in this circuit.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (c) A is true but R is false

Explanation:

Assertion is true. When a capacitor is connected to an a.c. circuit, εrms = irms (1/Cω) where 1/Cω is the impedance due to capacitative resistance. The power consumed in this circuit is zero because the phase difference Q between emf and current in a pure capacitance a.c. circuit is π/2. Power factor cos ϕ = 0 . It is only for d.c. that a current does not flow. Reason is false.