A colleague and I were discussing this problem I made up:
Suppose there are two large parallel metal plates. To avoid the
problem of infinities, let us say each plate is 1 mm thick, each
plate is square of length 1 m on a side, and the two plates are
separated by 1 mm. A net charge of +2 C is put on the left plate and
charge -3 C on the right plate. Neglecting the fringing, what are the
electric fields to the left of the two plates, in the gap between the
two plates, and to the right of the two plates? Spell out all
physical assumptions used in your solution and not just the correct
numerical answers.
After trying it yourself, I'd like to know what you think of my
solution. (But try it yourself first, so you're not biased by my
approach!) -Carl
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Carl E Mungan, Assoc Prof of Physics 410-293-6680 (O) -3729 (F)
Naval Academy Stop 9c, 572C Holloway Rd, Annapolis MD 21402-1363 mailto:mungan@usna.eduhttp://usna.edu/Users/physics/mungan/