Instantaneous power output of an a.c. source can be negative but the average power output can never be negative.
Class 12 Physics Chapter 7 Alternating current Session 2024-2025.
Can the instantaneous power output of an a.c. source ever be negative? can the average power output be negative?
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Yes, the instantaneous power output of an A.C. source can be negative because power oscillates with the changing voltage and current. However, the average power output can never be negative since the net energy transfer over a cycle remains positive.
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