A resistor of

PHYSICS · Single correct · CBSE · Physics · Alternating Current · Alternating Current

Problem

A resistor of 20 Ω20\,\Omega, a capacitor of 10 μF10\,\mu\text{F}, and an adjustable inductor are connected in series to a 220 V220\,\text{V} (rms), 60 Hz60\,\text{Hz} supply. The inductance LL is first adjusted so that the circuit is in exact resonance with the supply frequency. After the adjustment, what will be the rms current in the circuit? (a) 7.8 A7.8\,\text{A} (b) 11 A11\,\text{A} (c) 5.5 A5.5\,\text{A} (d) 15.6 A15.6\,\text{A}

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