A coil of inductance and resistance is connected in series with a capacitor of…
PHYSICS · Subjective · CBSE · Physics · Alternating Current · Alternating Current
Problem
A coil of inductance L=0.20H and resistance R=50Ω is connected in series with a capacitor of capacitance C=20μF to an ac supply of rms voltage 100V.
(a) Calculate the resonant frequency of the circuit.
(b) Determine the rms current in the circuit at resonance.
(c) Find the rms current when the circuit is driven at 50Hz instead of the resonant frequency.
(d) Compare the currents obtained in parts (b) and (c) and comment on the result.