JEE Main 2020PhysicsGravitationEasyMCQ

JEE Main 2020 — Gravitation Question with Solution

JEE Main 2020 (09 Jan Shift 2)

Question

Planet A has mass M and radius R. Planet B has half the mass and half the radius of Planet A. If the escape velocities from the Planets A and B are vA and vB, respectively, then vAvB=n4. The value of n is:

Choose an option

Show full solutionCorrect option: A
Correct answer
A4

Step-by-step explanation

ve=2GMR
∴vAvB=2GMR2GM/2R/2=1=n4
⇒n=4

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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.