Concept:Excess charge on a conductor concentrates where the surface is most sharply curved.Explanation:Charge density and the electric field are highest at sharp points.At a sharp tip, the radius of curvature is very small, so the surface charge density σ becomes large.For the pear-shaped conductor, the sharpest point is the pointed tip, labelled X.Therefore, the outside charge concentration is greatest at that point.Answer:A. X
