JEE Main 2015PhysicsGravitationEasyMCQ

JEE Main 2015 — Gravitation Question with Solution

JEE Main 2015 (11 Apr Online)

Question

Which of the following most closely depicts the correct variation of the gravitation potential, V(r) with distance r due to a large planet of radius R and uniform mass density? (figures are not drawn to scale)

Choose an option

Show full solutionCorrect option: C
Correct answer
C

Step-by-step explanation

At inside points (r<R), V=-GM2R33R2-r2. So at the centre,   r=0⇒V=-32GMR . At outside points r>R, V=-GMr. At surface, V=-GMR. So the gravitational potential is non-uniform and negative.

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About this question

This is a previous-year question from JEE Main 2015, 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.