i used Mathematica to calculate the potential at the center of the cube,
when a->2a, the potential will be 4 times larger
But i can't see it intuitively!
Homework Statement
An insulating cube of edge a has a uniform charge density p. The charge is zero everywhere outside the cube. The potential at an infinite distance from the cube is taken to be zero. If the potential at the center of the cube is Vo, find the potential at a corner of the cube...