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Gravitation question

2012 · Q99
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Gravitation question

2012 · Q99

NEETPhysicsGravitationMCQ+4 / −1
Which one of the following plots represents the variation of gravitiational field on a particle with distance r due to a thin spherical shell of radius R? (r is measured from the centre of the spherical shell)
  1. A
    AIPMT 2012 Mains Physics - Gravitation Question 44 English Option 1
  2. B
    AIPMT 2012 Mains Physics - Gravitation Question 44 English Option 2
  3. C
    AIPMT 2012 Mains Physics - Gravitation Question 44 English Option 3
  4. D
    AIPMT 2012 Mains Physics - Gravitation Question 44 English Option 4
View written solutionFree

Correct answer: B

Gravitational field due to the thin spherical shell Inside the shell, i.e. (For r < R)

F = 0

On the surface of the shell, i.e. (For r = R)

F=GMR2F = {{GM} \over {{R^2}}}F=R2GM​

Outside the shell, i.e. (For r > R)

F=GMr2F = {{GM} \over {{r^2}}}F=r2GM​

The variation of F with distance r from the centre is as shown in the adjacent figure.

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