1. The problem statement, all variables and given/known data While solving problems in electrostatics we assign zero of potential to infinity .But we also assign zero to ground as well. Now there are electrostatics problems where we use both ground and infinity as zero potential .How is that we have two zero potentials within a same problem? Is there something common in infinity and ground such that we can choose them as zero potential simultaneously ? Could somebody help me understand this ? Thanks !!