In an experiment, I drew two small electrodes on a piece of carbon paper then a large electrode around the perimeter of the paper so it formed a box around the two.

Question

What distortion of the field is produced by the large electrode around the perimeter of the paper?

Answer 1

down hill

Answer 2

since the perimeter is at a constant potential, all E lines will be perpendicular to it.

Answer 3

Thank you Bob, that makes a lot of sense