Physics

Problem

A resistor of

30\,\Omega

, an inductor of

0.15\,\text{H}

and a capacitor of

200\,\mu\text{F}

are connected in series to an AC source whose frequency can be varied. Determine the frequency at which the current will lag the source voltage by

45^{\circ}

. (Take

\pi^{2} \approx 10