In a series RLC circuit with

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

Problem

R = 20\,\Omega

L = 50\,\text{mH}

and

C = 200\,\mu\text{F}

, the source voltage amplitude is

10\,\text{V}

. If the driving frequency is doubled from its resonant value, what is the ratio of the new current amplitude to that at resonance? (a)

0.51

(b)

0.84

(c)

0.64

(d)

0.41