JEE Main 2018 — Gravitation Question with Solution
From: JEE Main 2018 (Offline)
Question
A particle is moving with a uniform speed in a circular orbit of radius R in a central force inversely
proportional to the nth power of R. If the period of rotation of the particle is T, then :
Choose an option
Show full solutionCorrect option: D
Correct answer
DT R(n+1)/2
Step-by-step explanation
We know, Central force in circular motion, F =
According to the question,
.......(1)
And we know,
...... (2)
From (1) and (2) we can conclude that,
According to the question,
.......(1)
And we know,
...... (2)
From (1) and (2) we can conclude that,
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This is a previous-year question from JEE Main 2018, 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.