Question

An LCR circuit with $100\Omega$ resistance is connected to an AC source of 200 V and angular frequency of 300 rad/s. When only capacitor is removed, current lags behind the voltage by ${60}^{\circ }$. When only inductor is removed, current leads voltage by ${60}^{\circ }$, then rms current in LCR circuit is

Answer 1

$X_L=\sqrt{3}\times 100\Omega ,X_C=\sqrt{3}\times 100\Omega$
$Z=\sqrt{R^2+(X_L-X_C{)}^2}=100$
$i=\frac{\epsilon }{2}=\frac{200}{100}=2A$