NEET Physics Power in AC Circuits MCQ Question
A series RLC circuit is driven by an AC voltage source with voltage v = v_m sin(ωt) and current i = i_m sin(ωt + φ). In a diagram representing the power in the circuit, which component is responsible for determining the phase difference φ that affects the power factor?
The inductance L
The capacitance C
The resistance R
The source voltage amplitude v_m
Correct Answer
Detailed Explanation
The phase difference φ, and consequently the power factor, depends on the impedance Z, which includes resistance R. The phase angle φ is determined by the relation φ = tan^(-1)((X_L - X_C)/R).
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