The electric field between two positively charged plates is uniform and directed from one plate to the other, with the field strength depending on the charge density and distance between the plates. When the plates are not infinite but have a small distance relative to their size, edge effects may occur, potentially complicating the field distribution. However, in general, a conductor placed in this field will not induce a charge, as like charges repel and the field remains uniform. The assumption that the field is zero between the plates is incorrect; instead, it is constant and non-zero in the region between them. Understanding these principles clarifies the behavior of charges in the presence of electric fields.