JEE Main Physics · Alternating Current

LCR Resonance in JEE Main

Name: LCR Resonance: JEE Main previous year questions
Creator: Lumi

LCR Resonance (Physics, Alternating Current) came 10 times in 10 of the 42 JEE Main shifts Lumi analysed, across 7 distinct ideas. 4 of them came in 2024–26; it was last asked in 2026.

Questions: 10; in 10 shifts
Ideas asked: 7; 2 asked more than once
Numerical answer: 4; 40% of its questions
Pattern: Asked most years; last asked 2026

Questions each year

In the shifts Lumi analysed for each year.

Difficulty and format

Easy 8Medium 2Hard 0

Format

Numerical value4 Q
Single correct4 Q
Diagram based1 Q
Other1 Q

Ideas inside the topic

7 ideas

Resonant Frequency Calculation3 Q
Resistance Effect on Resonance Curve2 Q
Series LCR Capacitive Below Resonance1 Q
LC Energy Oscillation at Resonance1 Q
Half-Power Frequencies1 Q
Impedance vs Frequency Curve1 Q
Q-Factor Formula in L, C, R1 Q

Where it sits

Part of Alternating Current, which had 37 questions in all. LCR Resonance accounts for 27% of them. In Lumi's JEE taxonomy it belongs to EMI and Alternating Current.

Every question

All 10 LCR Resonance questions

Newest first, each with its options and official answer.

5 Apr 2026, Shift 2 · Q48A series LCR circuit with $R=20\ \Omega$ , $L=1.6$ H and $C=40\ \mu\mathrm{F}$ is connected to a variable frequency a.c. source. The…EasyNumerical value
6 Apr 2024, Shift 2 · Q59For a given series LCR circuit it is found that maximum current is drawn when value of variable capacitance is 2.5 nF. If resistance of…EasyNumerical value
8 Apr 2024, Shift 1 · Q50A LCR circuit is at resonance for a capacitor C, inductance L and resistance R. Now the value of resistance is halved keeping all other…EasySingle correct
29 Jan 2024, Shift 1 · Q43A capacitor of capacitance $100\ \mu$ F is charged to a potential of 12 V and connected to a 6.4 mH inductor to produce oscillations. The…EasySingle correct
8 Apr 2023, Shift 2 · Q58A series combination of resistor of resistance 100 $\Omega$ , inductor of inductance 1 H and capacitor of capacitance 6.25 $\mu$ F is…EasyNumerical value
11 Apr 2023, Shift 1 · Q36As per the given graph, choose the correct representation for curve A and curve B. {Where $X_C$ = reactance of pure capacitive circuit…EasyDiagram basedHas a figure
25 Jul 2022, Shift 1 · Q42To increase the resonant frequency in series LCR circuit,EasySingle correct
28 Jul 2022, Shift 1 · Q54The frequencies at which the current amplitude in an LCR series circuit becomes $\frac{1}{\sqrt{2}}$ times its maximum value, are 212 rad…MediumNumerical value
29 Jun 2022, Shift 1 · Q40For a series LCR circuit, I vs $\omega$ curve is shown : (a) To the left of $\omega_r$ , the circuit is mainly capacitive. (b) To the left…EasyOtherHas a figure
18 Mar 2021, Shift 1 · Q15In a series LCR resonance circuit, if we change the resistance only, from a lower to higher value :MediumSingle correct