NEET Physics Question - Alternating Current

Assertion (A): Average power consumed in a circuit is never negative.

Reason (R): Instantaneous power is always positive.

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

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Average power consumed by passive circuits is non-negative. Instantaneous power \(p = vi\) can be negative during parts of an \(AC\) cycle, especially in reactive circuits, when energy is temporarily returned to the source.

Rankers Physics

Average vs. Instantaneous AC Power

Solution:

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