A series circuit consists of

PHYSICS · Subjective · CBSE · Physics · Alternating Current · Alternating Current

Problem

R = 10\,\Omega

L = 80\,\text{mH}

and

C = 40\,\mu\text{F}

. The circuit is driven first at

f_1 = 200\,\text{Hz}

and then at

f_2 = 400\,\text{Hz}

. (a) Calculate the impedance at

f_1

. (b) Calculate the impedance at

f_2

. (c) Which of the two frequencies is closer to the resonant frequency of the circuit? Justify your choice using the results obtained.