If we define electric potential to be zero at infinity, then the electric potential at the surface of the sphere is given by: V=kQR In particular, the electri...If we define electric potential to be zero at infinity, then the electric potential at the surface of the sphere is given by: V=kQR In particular, the electric field at the surface of the sphere is related to the electric potential at its surface by: E=VR Thus, if two spheres are at the same electric potential, the one with the smaller radius will have a stronger electric field at its surface.
