The potential at the surface of a planet of mass M and radius R is assumed to be zero. Choose the appropriate option(s).

Q: The potential at the surface of a planet of mass M and radius R is assumed to be zero. Choose the appropriate option(s).

(a) The potential at infinity is zero

(b) The potential at the centre of the planet is – GM/2R

(c)The potential at infinity is GM/R

(d) The potential at the centre of planet is (-3GM)/2R

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Ans: (b) , (c)