Which one of the following plots represents the variation of gravitational field on a particle with distance r due to a thin spherical shell of radius R? (r is measured from the centre of the spherical shell).
A)
B)
C)
D)
Correct Answer:
B
Solution :
Inside the shell, E = 0 And outside the shell, \[E\propto \frac{1}{r}\] Hence, graph [b] shows the exact result.