Q.

Statement-1:  Angular momentum of the planet orbiting around the sun remains constant(
Statement-2 :  Torque acting on the revolving planet is zero.

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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 A.

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Detailed Solution

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 τ=dLdt=0,  L=constant
No torque will act on plane otherwise Angular momentum will be variable and planet will become unstable.

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