JEE PHYSICS MCQ: GRAVITATION

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Assertion: Smaller the orbit of a planet around the sun, shorter is the time it takes to complete.
Reason: According to Kepler's third law of planetary motion, square of time period is proportional to cube of mean distance from the sun.

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Correct option: A

Assertion is True, Reason is True; Reason is a correct explanation for Assertion

Option A is correct because both the assertion and reason are true, and the reason (Kepler's third law) correctly explains why planets closer to the sun have shorter orbital periods.

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