A resistor and an inductor are connected in series with a variable capacitor to a…

PHYSICS · Multi-part · CBSE · Physics · Alternating Current · Alternating Current

Problem

A resistor

R=30\,\Omega

and an inductor

L=50\,\text{mH}

are connected in series with a variable capacitor to a

120\,\text{V}

(rms) AC supply operating at

1.0\,\text{kHz}

. (i) Determine the capacitance required so that the circuit is in resonance at

1.0\,\text{kHz}

. (ii) What will be the impedance of the circuit at resonance?