What is the word or way of referring to a neutral electrical potential. For example let's say you have a 10 cm sphere of electrically neutral mass that is 1 Kg mass and you separately have a different 10 cm sphere of 2 Kg mass. The electrostatic potential of either of these two spheres at any distance will be 0.
However the amounts of positive and negative charge will be twice as much in the more massive sphere in comparison to the less massive one. The neutral field density of the larger mass will be twice that of the smaller mass. What is the term for the neutral electric field density? Does anyone have useful references on this topic?