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Saturday, 31 October

JEE Main · Physics · Alternating Current

Power Factor at Resonance

JEE Main asked Power Factor at Resonance 4 times in 4 of the 108 shifts Lumi analysed, in 2021, 2022 and 2023. It belongs to LCR Resonance, in Alternating Current (Physics). The longest wait between two years asking it was 1 year. In 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2021
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200.03’210.03’220.14’230’240’250’26

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

Shift by shift

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

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20232 of 12
  • 20221 of 24
  • 20211 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.

  • Statement i/ii on power in series lcr circuit
  • Statement pair on series resonance

Difficulty

Easy 3Medium 1Hard 0

2 of the 4 questions had a numerical answer.

Every question

All 4 questions

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

  1. 12 Apr 2023, Shift 1 · Q35Given below are two statements: Statement I : When the frequency of an a.c source in a series LCR circuit increases, the current in the…EasyTwo statements
  2. 10 Apr 2023, Shift 1 · Q45Given below are two statements : Statement I : Maximum power is dissipated in a circuit containing an inductor, a capacitor and a resistor…EasyTwo statements
  3. 30 Jun 2022, Shift 1 · Q57A series LCR circuit with R = 25011\frac{250}{11} Ω\Omega and XL\mathrm{X_L} = 7011\frac{70}{11} Ω\Omega is connected across a 220 V, 50 Hz…MediumNumerical value
  4. 24 Feb 2021, Shift 2 · Q28A series LCR circuit is designed to resonate at an angular frequency ω0=105 rad/s\omega_0 = 10^5\ \mathrm{rad/s}. The circuit draws 16 W power from…EasyNumerical value

Shifts: 24 Feb 2021, Shift 2, 30 Jun 2022, Shift 1, 10 Apr 2023, Shift 1, 12 Apr 2023, Shift 1.

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