JEE Main 2021 — Circular Motion Question with Solution
From: JEE Main 2021 (Online) 27th August Morning Shift
Question
A huge circular arc of length 4.4 ly subtends an angle '4s' at the centre of the circle. How long it would take for a body to complete 4 revolution if its speed is 8 AU per second?
Given : 1 ly = 9.46 1015 m
1 AU = 1.5 1011 m
Given : 1 ly = 9.46 1015 m
1 AU = 1.5 1011 m
Choose an option
Show full solutionCorrect option: B
Correct answer
B4.5 1010 s
Step-by-step explanation
Time
put l = 4.4 9.46 1015
v = 8 1.5 1011
rad.
we get time = 4.5 1010 sec.
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This is a previous-year question from JEE Main 2021, covering the Circular 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.