NEET Physics Power in AC Circuits MCQ Question
In a series RLC circuit with a voltage v = v_m sin ωt and current i = i_m sin(ωt + φ), what is the expression for the average power dissipated in the circuit over a complete cycle?
P = V I cos φ
P = V I sin φ
P = V I tan φ
P = V I
Correct Answer
Detailed Explanation
The average power dissipated in an AC circuit is given by the formula P = V I cos φ, where φ is the phase difference between voltage and current, as derived from Eq. [7.38(a)] in the NCERT context.
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