Q. In the above problem, if the shell is replaced by a sphere of same mass and radius then the graph of $F(r)\ versus\ r$ will be
A) [image:8_image15.emf]
B) [image:8_image16.emf]
C) [image:8_image17.emf]
D) [image:8_image18.emf]
Explanation
(b) $F(r) = \left\{ \frac{\frac{GMm}{r^{2}}}{\frac{4\pi G\rho rm}{3}},r < R( \right.\ $where $\rho$ is density of sphere)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.