The charged plates of a parallel plate capacitor each have a charge density of sigma C/m^2. Using Gauss's law, compute the electric field between the plates.

Answer 1

Gauss' law says that

E*Area = sigma*Area/epsilon
or
E = sigma/epsilon

where epsilon is the permittitivy.

The answer will depend upon the dielectric constant of the material between the plates.

If there is a vacuum or air between the parallel plates,
epsilon = epsilonzero = 8.85*10^-12 farad/meter