JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 25 February 2021, Shift 2, Physics Q12

Question 12 of 90 in this shift, Physics question 12 of 30, Section A.

An LCR circuit contains resistance of

110\ \Omega

and a supply of 220 V at 300 rad/s angular frequency. If only capacitance is removed from the circuit, current lags behind the voltage by

45^{\circ}

. If on the other hand, only inductor is removed the current leads by

45^{\circ}

with the applied voltage. The rms current flowing in the circuit will be :

(1)1 A
(2)1.5 A
(3)2 AOfficial answer
(4)2.5 A

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
31 Aug 2021, Shift 1 · Q8In 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 :EasySingle 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.