JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 31 August 2021, Shift 1, Physics Q8

Question 8 of 90 in this shift, Physics question 8 of 30, Section A.

In an ac circuit, an inductor, a capacitor and a resistor are connected in series with

X_L = R = X_C

. Impedance of this circuit is :

(1)Zero
(2) $R\sqrt{2}$
(3) $R$ Official answer
(4) $2R^2$

Official answer

Option 3

NTA final key.

Chapter: Alternating Current
Topic: LCR Resonance
Idea tested: Impedance at Resonance

Same idea in other shifts

Asked 5× in all

6 Apr 2024, Shift 1 · Q44Given below are two statements : Statement I : In an LCR series circuit, current is maximum at resonance. Statement II : Current in a…EasyTwo statements
30 Jul 2022, Shift 2 · Q23A sinusoidal voltage V(t) = 200 sin2000 t volt is applied to a series LCR circuit in which L = 10 mH, C = 25 µF and R =100 Ω. The…EasyNumerical value
25 Jun 2022, Shift 2 · Q59In a series LCR circuit, the inductance, capacitance and resistance are $L$ = 100 mH, C= 100 µ $F$ and $R$ = $10\ \Omega$ respectively. They…EasyNumerical valueHas a figure
25 Feb 2021, Shift 2 · Q12An LCR circuit contains resistance of $110\ \Omega$ and a supply of 220 V at 300 rad/s angular frequency. If only capacitance is removed…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.