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  4. Which of the following graphs represents the gravitational field intensity due to solid sphere of radius R ?

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Q. Which of the following graphs represents the gravitational field intensity due to solid sphere of radius $ R $ ?Physics Question Image

AMUAMU 2011Gravitation

Solution:

Let, $a$ solid sphere of radius $R$, mass $M$ and centre at $O$
$I = \frac{GMr}{R^3}, \,\,\,(r < R )$
if $r > R$
$ I = \frac{GM}{r^2}$
image