Physics - EMI/AC Question with Solution | TestHub

Recall the formula of impedance is in terms of resistance,$Z=\sqrt{{\left(X_L-X_C\right)}^2+R^2}$, here, the condition of resonance,$X_L=X_C$, it means,
$Z=\sqrt{{\left(X_L-X_L\right)}^2+R^2}=R$