The intensity of gravitational field at a point situated at a distance of 8000km form the centre of the earth is `6N//kg`. The gravitational potential at that point is -(in joule /kg)

Options

A. 6
B. `4.8xx10^(7)`
C. `6xx10^(5)`
D. `4.8xx10^(2)`

Answer

B

Explanation

`I_(g)=(GM)/(R^(2)),V=-(GM)/(R)`
`V=I_(g)R=6xx8xx10^(6)=4.8xx10^(7)`