Question

A positive charge q is placed in front of a conducting solid cube at a distance d from its centre. Find the electric field at the centre of the cube due to the charges appearing on its surface.

Answer 1

We know electric field at a point due to a given charge E $=\frac{q}{4\pi {ϵ}_0{d}^2}$
where q = charge, R = distance between point and the charge