Learn

Saturday, 31 October

JEE Main · Physics · Alternating Current

Resonant Frequency Calculation

JEE Main asked Resonant Frequency Calculation 9 times in 9 of the 108 shifts Lumi analysed, in 2021, 2022, 2024 and 2026. It belongs to LCR Resonance, in Alternating Current (Physics). The longest wait between two years asking it was 2 years. In 2021, 2022 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
9
in 9 shifts
Years
4 of 8
First asked
2021
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200.10’210.10’220’230.09’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 3 in 24 shifts · 2022: 3 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20250 of 8
  • 20242 of 18
  • 20230 of 12
  • 20223 of 24
  • 20213 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Reactance at resonance from lcr values
  • Frequency of series lcr at resonance

Difficulty

Easy 7Medium 2Hard 0

6 of the 9 questions had a numerical answer.

Every question

All 9 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 5 Apr 2026, Shift 2 · Q48A series LCR circuit with R=20 ΩR=20\ \Omega, L=1.6L=1.6 H and C=40 μFC=40\ \mu\mathrm{F} is connected to a variable frequency a.c. source. The…EasyNumerical value
  2. 1 Feb 2024, Shift 1 · Q43In series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new inductance should be :EasySingle correct
  3. 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
  4. 29 Jun 2022, Shift 2 · Q60An inductor of 0.5 mH, a capacitor of 200 μF and a resistor of 2 Ω are connected in series with a 220 VV ac source. If the current is in…EasyNumerical value
  5. 28 Jun 2022, Shift 1 · Q60A telegraph line of length 100 km has a capacity of 0.01 μ\muF/km and it carries an alternating current at 0.5 kilo cycle per second. If…EasyNumerical value
  6. 25 Jul 2022, Shift 1 · Q42To increase the resonant frequency in series LCR circuit,EasySingle correct
  7. 25 Jul 2021, Shift 2 · Q25Two circuits are shown in the figure (a) & (b). At a frequency of __________ rad/s the average power dissipated in one cycle will be same…MediumNumerical valueHas a figure
  8. 26 Feb 2021, Shift 2 · Q18Find the peak current and resonant frequency of the following circuit (as shown in figure).MediumDiagram basedHas a figure
  9. 25 Feb 2021, Shift 1 · Q27A transmitting station releases waves of wavelength 960 m. A capacitor of 2.56 μ2.56\ \muF is used in the resonant circuit. The self…EasyNumerical value

Shifts: 25 Feb 2021, Shift 1, 26 Feb 2021, Shift 2, 25 Jul 2021, Shift 2, 28 Jun 2022, Shift 1, 29 Jun 2022, Shift 2, 25 Jul 2022, Shift 1, 1 Feb 2024, Shift 1, 6 Apr 2024, Shift 2, 5 Apr 2026, Shift 2.

Same topic

Other ideas in LCR Resonance

LCR Resonance has 15 ideas JEE Main has asked; 7 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas