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Question 30732
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Gravitation: Angular Momentum in Orbit MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Angular Momentum in OrbitMediumQuestion 30732

Question

For a satellite in elliptical orbit, angular momentum L is:
  1. A
    Constant throughout the orbit
    Correct
  2. B
    Maximum at periapsis
  3. C
    Maximum at apoapsis
  4. D
    Proportional to orbital speed

Correct answer

Constant throughout the orbit

Explanation

No external torque acts on the satellite (gravity is central). Therefore angular momentum L = mvr is conserved throughout the orbit. This is the basis of Kepler's 2nd law.

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