Question

A point mass is placed inside a thin spherical shell of radius $ H $ and mass $ M $ at a distance $R/2$ from the centre of the shell. The gravitational force exerted by the shell on the point mass is.

• A. $\frac{G M}{-2 R^{2}}$
• B. $\frac{G M}{2 R^{2}}$
• C. zero
• D. $ \frac{GM}{4R^{2}} $

Answer 1

Answer: (C)

Intensity due to spherical shell inside the surface $I=0$
Gravitational field $F=\text{Im}$
$F=0 \times m=0$
$ F=0$