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Saturday, 31 October

JEE Main · Physics · System of Particles and Rotational Motion

MOI Change by Bending a Rod

JEE Main asked MOI Change by Bending a Rod 2 times in 2 of the 108 shifts Lumi analysed, in 2021 and 2025. 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
2021
last in 2025
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200.03’210’220’230’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20240 of 18
  • 20230 of 12
  • 20220 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

Single correct is the usual form. Skill tested: application.

  • Moment of inertia of ring formed from rod
  • Moment of inertia of wire bent into arc

Difficulty

Easy 1Medium 1Hard 0

Every question was multiple choice.

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. 8 Apr 2025, Shift 2 · Q28A rod of linear mass density 'λ\lambda' and length 'L' is bent to form a ring of radius 'R'. Moment of inertia of ring about any of its…MediumSingle correct
  2. 18 Mar 2021, Shift 2 · Q6Consider a uniform wire of mass M and length L. It is bent into a semicircle. Its moment of inertia about a line perpendicular to the…EasySingle correct

Shifts: 18 Mar 2021, Shift 2, 8 Apr 2025, Shift 2.

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