Question

Assume that charge −q is placed on the top plate, and +q is placed on the bottom plate. what is the magnitude of the electric field e between the plates? express e in terms of q and other quantities given in the introduction, in addition to ϵ0 and any other constants needed.

Answer 1

B?) Electric field E = q / (εo*A)

C) V = E*d = q*d / (εo*A)

D) V = q / C
so C = q / V = q * 1/V = q*εo*A / q*d = εo*A / d

I hope this helps! ^_^