The electric field, between a pair of oppositely charged parallel plates, neither gets weaker, nor obeys the inverse-square law.
Work Step by Step
This is discussed on page 419. The field is uniform between 2 closely-spaced charged plates.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.