A coil of inductance and resistance is connected in series with a capacitor to a AC supply

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

Problem

A coil of inductance

L=50\,\text{mH}

and resistance

R=20\,\Omega

is connected in series with a capacitor to a

60\,\text{Hz}

AC supply. If the current is required to lead the source voltage by

30^{\circ}

, the capacitance should be approximately (a)

74\,\mu\text{F}

(b)

87\,\mu\text{F}

(c)

50\,\mu\text{F}

(d)

92\,\mu\text{F}