Question

Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by

Answer 1

Correct option (a)

Explanation:

For a point inside the earth i.e. r<R

E = GM/R³ r

where M and R be mass and radius of the earth respectively.

At the centre, r = 0

.'.  E = 0

For a point outside the earth i.e. r<R

E = GM/r²

On the surface of the earth i.e. r = R.

E = GM/R²

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