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NEETPhysicsGravitation

Statement-I: All other planets except mercury and pluto revolve around the sun in almost circular orbits. Statement-II: If the radius of planet decreases by ( x % ) keeping the mass constant. The acceleration due to gravity on its surface increases by (x % ).

Options

  1. ABoth Statement-I and Statement-II are correct.
  2. BBoth Statement-I and Statement-II are incorrect.
  3. CStatement-I is correct & Statement-II is incorrect.
  4. DStatement-I is incorrect & Statement-II is correct.

Correct answer

C. Statement-I is correct & Statement-II is incorrect.

Step-by-step solution

- I: Except Mercury and Pluto, the other planets have very small orbital eccentricities ( ) orbits are nearly circular. ( ^ ) II: (g= G M R^2 ). If (R ) decreases by (x ) ( (R^ =R (1- x 100 ) )), then (g^ = G M R^2 = G M R^2 (1- x 10 )^2 =g (1- x 100 )⁻² ) It is not (x ).

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