NEET Physics Power in AC Circuits Assertion Reason Question
Assertion (A): In a series RLC circuit, the average power dissipated over a complete cycle is zero if the phase difference between voltage and current is 90 degrees. | Reason (R): The power factor, defined as cos(φ), is zero when the phase difference is 90 degrees.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Correct Answer
Detailed Explanation
In a series RLC circuit, average power dissipated depends on the power factor cos(φ). When φ = 90 degrees, cos(φ) = 0, leading to zero average power over a cycle.
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