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Question

# Match the Column I with Column IIColumn IColumn II(A) Kepler's first law(p) T2∝a3(B) Kepler's second law(q) Inverse square law(C) Kepler's third law(r) Orbit of planet is elliptical(D) Newton's law of gravitation(s) Law of conservation of angular momentum

A
A-s, B-p, C-q, D-r
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B
A-p, B-q, C-r, D-s
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C
A-r, B-s, C-p, D-q
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D
A-s, B-p, C-q, D-s
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Solution

## The correct option is B A-r, B-s, C-p, D-qAccording to Kepler's first law, all planets move in elliptical orbits with the sun situated at one of the foci. A−rKepler's second law is a consequence of law of conservation of angular momentum. B−sAccording to the Kepler's third law, the square of the time period of revolution of a planet is proportional to the cube of the semi-major axis of the ellipse traced out by the planet. T2∝a3∴C−pAccording to Newton's law of gravitation. everybody in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. D−q

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