A charge Q0 placed at the centre of sphere (2) will produce a symmetrical field distribution with reference to the plane P, but this charge makes the potentials at the surface of the imaginary spheres non-equipotential.
A charge Q0 placed at the centre of sphere (2) will producea symmetrical field distribution with reference to the plane P, but this chargemakes the potentials at the surface of the imaginary spheres non-equipotential.