Q: Two bodies of masses M_{1} and M_{2} are placed at a distance R apart. Then at the position where the gravitational field due to them is zero, the gravitational potential is

(a) $ \displaystyle -G\frac{\sqrt M_1}{R} $

(b) $ \displaystyle -G\frac{\sqrt M_2}{R} $

(c) $ \displaystyle -G (\sqrt M_1 + \sqrt M_2)^2 \frac{G}{R} $

(d) $ \displaystyle -G (\sqrt M_1 – \sqrt M_2)^2 \frac{G}{R} $

Ans: (c)