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Saturday, 31 October

JEE Main · Physics · Electromagnetic Induction

Rotational Motional EMF

JEE Main asked Rotational Motional EMF 5 times in 5 of the 108 shifts Lumi analysed, in 2022, 2023, 2024 and 2026. It belongs to Faraday's Law, in Electromagnetic Induction (Physics). The longest wait between two years asking it was 2 years. In 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
4 of 8
First asked
2022
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022, 2023, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200’210.03’220.07’230.09’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 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
  • 20231 of 12
  • 20221 of 24
  • 20210 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.

  • Emf of rotating rod in non-uniform field
  • Emf across rotating fan blades

Difficulty

Easy 1Medium 3Hard 1

3 of the 5 questions had a numerical answer.

Every question

All 5 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 · Q36A metal rod of length LL rotates about one end at origin with a uniform angular velocity ω\omega. The magnetic field radially falls off…HardSingle correct
  2. 30 Jan 2024, Shift 1 · Q58A ceiling fan having 3 blades of length 80 cm each is rotating with an angular velocity of 1200 rpm. The magnetic field of earth in that…MediumNumerical value
  3. 4 Apr 2024, Shift 2 · Q53A rod of length 60 cmcm rotates with a uniform angular velocity 20 rad s−1s^{-1} about its perpendicular bisector, in a uniform magnetic…MediumNumerical value
  4. 15 Apr 2023, Shift 1 · Q58A 20 cm long metallic rod is rotated with 210 rpm about an axis normal to the rod passing through its one end. The other end of the rod is…MediumNumerical value
  5. 26 Jun 2022, Shift 2 · Q44A metallic conductor of length 1m rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity 5…EasySingle correct

Shifts: 26 Jun 2022, Shift 2, 15 Apr 2023, Shift 1, 30 Jan 2024, Shift 1, 4 Apr 2024, Shift 2, 5 Apr 2026, Shift 2.

Same topic

Other ideas in Faraday's Law

Faraday's Law has 13 ideas JEE Main has asked; 7 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas