Physics

Problem

A series RLC circuit has

R=20\,\Omega

L=0.05\,\text{H}

, and

C=80\,\mu\text{F}

. It is connected to an AC source of rms voltage

100\,\text{V}

at a frequency of

40\,\text{Hz}

. What is the ratio of the rms current at resonance to the rms current at

40\,\text{Hz}

(nearest tenth)? a)

3.3

0.5

2.1

2.9