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QJEEM21Phe75c: JEE Main 2021 Physics - Class 11 JEEM21Phe75c Solution: A geostationary satellite is orbiting around an arbitrary…

A geostationary satellite is orbiting around an arbitrary planet 'P' at a height of 11R above the surface of 'P', R being the radius of 'P'. The time period of another satellite in hours at a height of 2R from the surface of 'P' is _________. 'P' has the time period of 24 hours.

Multiple Choice Options

  • A 3
  • B 5
  • C 626\sqrt 2
  • D 62{6 \over {\sqrt 2 }}

Step-by-Step Verified Solution

JEE Main 2021 (Online) 17th March Evening Shift Physics - Gravitation Question 116 English Explanation
From Kepler's law

T2∝R3{T^2} \propto {R^3}

(24T)2=(12R3R)3{\left( {{{24} \over T}} \right)^2} = {\left( {{{12R} \over {3R}}} \right)^3}

T = 3 sec

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