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JEE Main 2021 (18 Mar, Shift 1) · Satellites - Orbital Velocity & Period

Satellites - Orbital Velocity & Period question from JEE Main 2021 (18 Mar, Shift 1)

Q43JEE Main 2021 · 18 MAR · SHIFT 1Easy

Satellites - Orbital Velocity & Period

The time period of a satellite in a circular orbit of radius R is T. The period of another satellite in a circular orbit of radius 9R is:

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Answer: (b)

Kepler's third law: $T \propto r^{3/2}$ .
$T' = T \times 9^{3/2} = 27T$
So the answer is (b) $27T$ .

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