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  9. Q901

RPF Constable (Executive) 2025 · Question 901 of 1580

Which of the following options does NOT represent one of Kepler's laws of planetary motion?

General

  1. AThe orbit of all planets around the Sun are coplanar.Correct
  2. BThe orbit of each planet around the Sun is an ellipse with the Sun at one of the two foci.
  3. CA line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.
  4. DThe square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit. Page 40 of 60

Answer: A. The orbit of all planets around the Sun are coplanar.

Official answer key verified. Detailed explanation coming soon.

Source: RPF Constable 2025 Question Paper All Shifts English (aglasem compilation of official response sheets, e) · official-answer-key

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