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Q.

 

 

Assertion (A) :The angular speed of a planet around the sun increases when it is closer to the sun.

Reason (R):The total angular momentum of the system remains constant. 
 

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a

If assertion is true but reason is false 

b

If both assertion and reason are true and reason is the correct explanation of assertion

c

If both assertion and reason are false 

d

If both assertion and reason are true but reason is not the correct explanation of assertion

answer is A.

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Detailed Solution

When angular momentum is conserved, if the distance decreases, angular velocity increases.

Angular momentum=L=mr2ω= constant.

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