The magnitude of force of attraction on a point mass m due to hollow sperical shell of mass M and radius R as funciton of its distance r form the centre is given is

Options

A. `A rarr (GMm)/(r^(2)), B rarr zero`
B. `A rarr zero , B rarr (GMm)/(r^(2))`
C. `A rarr (GMm)/(R^(2)), B rarr(GMm)/(r^(2))`
D. none of the abvoe

Answer

C

Explanation

For a hollow sperhical shell
`F^(r )={("zero" GMm)/(r^(2)), r ge R`