Question

If the point charge is now moved to a distance 'd' from the centre of the square and the side of the square is doubled, explain how the electric flux will be affected.

Answer 1

 If we move the charge to a distance d and the square side changes to 2d, still the point charge can be imagined at the centre of a cube of side 2d. 
Again the flux through one face of the cube will be 1/6 of the total electric flux due to the charge q. 

Hence, the electric flux through the square will not change and it will remain the same i.e q/6ε