Q.27. Solving Poission s equation V p = -Po/Eo for the electrostatic potential p(x) in a region with a constant charge density p0, two students find different answers, VIZ. poX& 2( X) = - Poy Eo The reason why these different solutions are both [TIFR-20141 correct 1s because (a) space is isotropic and hence x and y are physically equivalent. (b) we can add solutions of L aplace's equation to both p(T ) and p2(E). (c) the electrostatic energy is infinite for a constant charge density. (d) the boundary conditions are different in the two cases.