A solid conducting sphere has a radius of r $.$ The sphere contains a charge of $+$Q that is evenly distributed over its surface. Express the magnitude of the electric field at a perpendicular distance d below the surface of the sphere. Assume d $<$ r Question $1$ options: $1)2$KQ$/$ r$^22)$ KQ$/($r$+$d$)^23)$ KQ$/$ r$^24)$ KQ$/$ d$^25)0$