For a series RLC circuit with

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

R=30\,\Omega

L=0.10\,\text{H}

and

C=25\,\mu\text{F}

, determine the frequency at which the current lags the source voltage by

45^{\circ}

. (Take

\pi=3.14

.) (a)

100\,\text{Hz}

(b)

120\,\text{Hz}

(c)

80\,\text{Hz}

(d)

250\,\text{Hz}