A coil of resistance and inductance is connected in series to a , AC source.

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A coil of resistance

50\,\Omega

and inductance

0.20\,\text{H}

is connected in series to a

240\,\text{V (rms)}

50\,\text{Hz}

AC source. (i) Calculate the initial power factor of the coil. (ii) A capacitor is now added in series so that the current leads the voltage by

10^{\circ}

. Calculate the capacitance required to achieve this condition.