An electric field is set up between two parallel plates, each of area 2.0 m^2, b

Question

An electric field is set up between two parallel plates, each of area 2.0 m^2, by putting 1.0 muC of charge on one plate and - 1.0 muC of charge on the other. The plates are separated by 4.0 mm with their centers opposite each other, and the charges are distributed uniformly over the surface of the plates. What is the magnitude of the electric field between the plates at a distance of 1.0 mm from the positive plate, but not near the edges of the plates? (epsilon_0 = 8.85 times 10^-12 C^2/n Middle Dot m^2)

Explanation / Answer

The capacitor stores a net separated charge of 1C (ie .. +1C of charge has been moved from the (now) negative plate to the + plate)
The field (E) between the plates is uniform (same at all points .. away from the edges) and given by
E = q / (A ) N/C (q = separated charge, A = overlapping plate area)
E = 1.0^-6C / (2.0m² x 8.85^-12)

E = 5.65*10^4 N/C

Option D is correct

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