The electric field intensity between charged parallel plates remains constant as long as the plate area is significantly larger than the distance between them. While edge effects can occur, the field is generally uniform in the central region of the plates. The intensity is proportional to the separation distance, meaning that as the distance increases, the electric field strength also changes. If either lateral dimension of the plates decreases significantly, they can behave like line or point charges, altering the electric field characteristics. Overall, for practical applications, maintaining large plate dimensions relative to their separation ensures a constant electric field intensity.
