Question

Given below are two statements.

Assertion : A choke coil is preferred over a resistor to adjust current in an AC circuit.

Reason : Power factor for inductance is zero, so, power loss is also zero for a full cycle.

Based on the above statements, choose the correct alternative.

• A. Both assertion and reason are true, and the reason is a correct explanation of the assertion.
• B. Both assertion and reason are true, but the reason is not a correct explanation of the assertion.
• C. Assertion is true, but the reason is false.
• D. Assertion is false, but the reason is true.

Answer 1

The correct option is A Both assertion and reason are true, and the reason is a correct explanation of the assertion.

A choke coil is an inductance coil of very small resistance used for controlling current in an AC circuit.

Therefore, it acts as pure inductive AC circuit part in which there is no power loss for a full cycle.

Due to this reason, a choke coil is preferred over a resistor to adjust current in an AC circuit.

Hence, option $\left(A\right)$ is the correct answer.