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Questions  

Two bodies of masses M1, and M2 are kept separated by a distance d. The potential at the point where the gravitational field produced by them is zero, is :

a
−GdM1+M2+2M1M2
b
−GdM1M2+2M1+M2
c
−GdM1−M2+2M1M2
d
−GdM1M2−2M1+M2

detailed solution

Correct option is A

GM1x2=GM2(d−x)2⇒d−xx=M2M1⇒dx=1+M2M1⇒x=M1dM1+M2Now potential V=GM1x−GM2d−x=−GdM1+M2+2M1M2

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