Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A sphere of mass M and radius R 2 has a concentric cavity of radius R 1 as shown in figure. The force F exerted by the sphere on a particle of mass m located at a distance r from the center of sphere varies as 0 $\leq$ r $\leq$ ∞
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
$F=0$ when $0 \leq r \leq R_1$
because intensity is zero inside the cavity.
F increase when $R_1 \leq r \leq R_2$
$F \propto \frac{1}{r^2}$ when $r > R_{2}$
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