Q.

Statement-1: viscous force will not change the angular momentum of this satellite.
Statement-2 : Viscous force will change the velocity of satellite.
 

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a

Statement-1 is false. Statement-2 is true.

b

Statement-1 is true. Statement-2 is false

c

Statement -1 is true. Statement-2 is true and it is correct explanation for statement-1

d

Statement-1 is true. Statement-2 is true but it is not correct explanation for statement-1

answer is D.

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Detailed Solution

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For satellite revolving in a circular orbit.
mv2r=GMmr2or  mv2r=GMm=constant(mvr)ν=Lv=constant
Air friction will provide a retarding torque to satellite and thus velocity of satellite will not change 
L1=mv1r1andL2=mv2r2

If  L2<L1andr2<r1thenv2>v1
 

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