Which one of the following plots represents the variation of the gravitational field on a particle with distance `r` due to a thin spherical shell of raduis `R`? (`r` is measured from the centre of the spherical shell).

Options

A.
B.
C.
D.

Answer

B

Explanation

Gravitational field due to the thin spherical shell Inside the shell, F=0 (For r < R)
On the surface of the shell,
` F = (GM)/(R^2) ` (For r =R) ?
Outside the shell, `F = (GM)/(r^2) ` (for r > R)
The variation of F with distance r from the centre is as shown in the figure.