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Q.

The angular momentum of a planet of mass M moving around the sun in an elliptical orbit is L→ . The magnitude of the areal velocity of the planet is LnM.

Find the value of n.

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a

4Lm

b

2Lm

c

Lm

d

L2m

answer is B.

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Detailed Solution

Assuming SAB a triangle 

Question Image

 dA=12Vdtr
Areal velocity momentum  L=mvr    ⇒vr=Lm   ⇒dAdt=L2m
 

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