What makes the electric field uniform? I learned it as a field that doesn't vary from place to place, but I'm trying to understand that better conceptually. For example, for problem #6 on the multiple choice http://www.enc.edu/~john.u.free/PY 202 2006-7/Resources/Exam_1_05-06.htm Would all 3 produce a uniform field from + to -? What sort of arrangement would produce a nonuniform field? Thanks!