JEE Main 2025 — Rotational Motion Question with Solution
From: JEE Main 2025 (Online) 28th January Morning Shift
Question
Two iron solid discs of negligible thickness have radii and and moment of intertia and , respectively. For , the ratio of and would be , where _______ .
Enter your answer
Show full solutionCorrect answer: 16
Correct answer
16
Step-by-step explanation
Let surface mass density =
So,
(As
Hence,
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Rotational Motion chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2025, covering the Rotational Motion chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.