JEE Main 2021 — Rotational Motion Question with Solution
From: JEE Main 2021 (Online) 18th March Evening Shift
Question
Consider 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 plane of the wire passing through the center is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
From figure,
L = R
R =
Moment of inertia about center O,
I = MR2 = M =
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This is a previous-year question from JEE Main 2021, 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.