JEE Main 2020 — Gravitation Question with Solution
From: JEE Main 2020 (Online) 3rd September Evening Slot
Question
The mass density of a planet of radius R varies with the distance r from its centre as
(r) = .
Then the gravitational field is maximum at :
(r) = .
Then the gravitational field is maximum at :
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
dm = dv
M =
Also E =
For maximum E,
= 0
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Gravitation 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 2020, covering the Gravitation 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.