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.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reasonb is false
D. If both assertion and reason are false.

Answer

C

Explanation

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.