Question

+Q is placed at every corner of Cube, - Q is placed at every edge centre, +Q is placed at face Centre. find Flux of cube?

Answer 1

We can construct other identical cubes and arrange them with the given cube such that charged edge is symmetrically placed in the resulting bigger cube , then flux through given original cube is Gauss's theorem is +Q/(neo), where n is total number of cubes in the above mentioned arrangement .eo is permittivity of space.

If instead of edge there is corner then, n=8.