JEE Main 2026 · 5 Apr · Shift 2 · Physics Q48

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PhysicsInteger+4 / -1Question 48 of 75

A series LCR circuit with $R=20$ Ω, $L=1.6$ H and $C=40$ μF is connected to a variable frequency a.c. source. The inductive reactance at resonant frequency is ________ Ω.

Your answer

Answer and worked solution

Official answer: 200

Resonance.
$\omega=\frac1{\sqrt{LC}}=\frac1{\sqrt{1.6\times40\times10^{-6}}}=125\text{ rad/s}.$

Reactance. $X_L=\omega L=125\times1.6=200$ Ω.

Answer: 200

Topics:LCR circuits and resonance

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JEE Main 2026 · 5 Apr · Shift 2, Physics question 48