Hi guys, I have got stuck understanding the following problem. # A straight wire of length L has a uniformly distributed charge Q. Find the electric field on the axis of the wire a distance z from the center of the wire for the cases (a) z> L/2 (b) -L/2<z<L/2 To begin with, I think they are asking to find the field along the perpendicular bisector of the wire. Also, there are 2 cases to considered. But I don't see much difference between them. Both mean points close to the wire. Have I understood it wrongly? Could anyone clarify it.