JEE MAIN - Physics (2021 - 27th August Evening Shift - No. 8)
A mass of 50 kg is placed at the centre of a uniform spherical shell of mass 100 kg and radius 50 m. If the gravitational potential at a point, 25 m from the centre is V kg/m. The value of V is :
$$-$$60 G
+2 G
$$-$$20 G
$$-$$4 G
Explanation
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$${V_A} = \left[ { - {{G{M_1}} \over r} - {{G{M_2}} \over R}} \right]$$
$$ = \left[ { - {{50} \over {25}}G - {{100} \over {50}}G} \right]$$
$$ = - 4G$$
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