JEE Main 2018 — Rotational Motion Question with Solution
JEE Main 2018 (08 Apr)
Question
From a uniform circular disc of radius R and mass 9 M, a small disc of radius is removed as shown in the figure. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through centre of disc is:
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
By parallel axis theorem,
Mass of smaller disc
MI of smaller disc
Mass of smaller disc
MI of smaller disc
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 2018, 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.