Resonance, Bandwidth & Q Factor question from MHT CET 2026 (20 Apr, Shift 1)

Answer: (b)

1. $i = \dfrac{V}{\sqrt{R^2 + (X_L - X_C)^2}}$: at low $f$, $X_C$ is large; at high $f$, $X_L$ is large, so $i$ is small at both ends.
2. At $f_0$, $Z = R$ is minimum, so $i$ rises smoothly to a single peak and falls again.
3. Graph (P) shows this smooth bell-shaped curve.
4. So the answer is (b) (P).