Assertion :Angular speed of a planet around the sun increases, when it is closer to the sun. Reason: Total angular momentum of the system remains constant.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
According to Law of Conservation of Angular Momentum, the total angular momentum of the system remains constant when the sum of external torques is zero. Thus for a planet Sun system, the angular momentum is conserved.
Hence angular speed and distance from sun are inversely related.

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