NEET Physics Power in AC Circuits MCQ Question
Which of the following statements about power in AC circuits is correct?
The average power consumed in an AC circuit is given by P = VI cosφ, where φ is the phase difference.
RMS values for AC quantities are not necessary to calculate average power.
The instantaneous power in an AC circuit is always positive.
The relation between AC voltage and current is different from that in DC circuits.
Correct Answer
Detailed Explanation
The correct statement is that average power in AC circuits is indeed given by P = VI cosφ, where φ is the phase difference between voltage and current. This derives from the average power formula provided in the NCERT content.
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