A series circuit has

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

Problem

R = 30\,\Omega

L = 0.10\,\text{H}

and

C = 10\,\mu\text{F}

and is connected to a

100\,\text{V}

(rms) variable-frequency source. (i) Find the rms current when the supply frequency is

400\,\text{Hz}

. (ii) Will the rms current at

800\,\text{Hz}

be larger or smaller than that at

400\,\text{Hz}

? Justify by stating the sign of the net reactance at

800\,\text{Hz}