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Saturday, 31 October

JEE Main · Physics · System of Particles and Rotational Motion

MOI Changes During Reshaping

JEE Main asked MOI Changes During Reshaping 2 times in 2 of the 108 shifts Lumi analysed, in 2022 and 2026. It belongs to Moment of Inertia, in System of Particles and Rotational Motion (Physics). The longest wait between two years asking it was 4 years.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
2 of 8
First asked
2022
last in 2026
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200’210.03’220’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20230 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.

  • Ratio of moments of inertia after reshaping
  • Ratio of moi of rod and ring from same rod

Difficulty

Easy 0Medium 2Hard 0

1 of the 2 questions had a numerical answer.

Every question

All 2 questions

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

  1. 4 Apr 2026, Shift 1 · Q30A solid sphere of mass MM and radius RR is divided into two unequal parts. The smaller part having mass M/8M/8 is converted into a sphere…MediumSingle correct
  2. 29 Jun 2022, Shift 2 · Q57The moment of inertia of a uniform thin rod about a perpendicular axis passing through one end is I1I_1 . The same rod is bent into a ring…MediumNumerical value

Shifts: 29 Jun 2022, Shift 2, 4 Apr 2026, Shift 1.

Same topic

Other ideas in Moment of Inertia

Moment of Inertia has 18 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas