Assertion: In series $RL$ AC circuit, voltage leads the current.

Reason: In series $RC$ AC circuit, current leads the voltage.

Assertion: An alternating current of frequency $50 \mathrm{Hz}$ becomes zero, $100$ times in one second.

Reason: Alternating current changes direction and becomes zero twice in a cycle.

Assertion: DC and AC both can be measured by a hot wire instrument.

Reason: The hot wire instrument is based on the principle of heating effect of current.

For series $RLC$ circuit, the graph between current and frequency of voltage source is shown in figure.

Assertion: Nature of circuit in region $\left(1\right)$ is capacitive while in region $\left(2\right)$ is inductive.

Reason: Power factor of circuit in region $\left(1\right)$ is negative and in region $\left(2\right)$ is positive.

Assertion: In series $LCR$ circuit, the phase difference between current and voltage is never zero.

Reason: Voltage and current are never in phase.

Assertion: A capacitor is used to minimise power loss.

Reason: A capacitor alters the phase voltage.