First slide

Gravitaional potential at a point

Question

By which curve will the variation of gravitational potential of a hollow sphere of radius R with distance be depicted

Moderate

A
B
C
D

Solution

For hollow sphere
$V_{in} = \frac{- GM}{R}, V_{sufface} = \frac{- GM}{R}, V_{out} = \frac{- GM}{r}$
i.e. potential remain constant inside the sphere and it is equal to potential at the surface and increase when the point moves away from the surface of sphere.

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