If potential at the surface of earth is assigned zero value, then potential at centre of earth will be (Mass = M, Radius = R) a) 0 b) -GM/2R C) -3GM/2R D) 3GM/2R Share with your friends Share 51 Ved Prakash Lakhera answered this Whatever is the potential at surface of the earth , same is the potential at the centre of the earth. This is because the amunt of workdone in takingthe a unit positive charge to the centre of the earth is zero. So the potential at the centre of the earth is zero.Therefore the correct option is a 0. -389 View Full Answer