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## Homework Statement

Two thin conducting plates, each 25.0 cm on a side, are situated parallel to one another and 5.0 mm apart. If ##10^{-11}## electrons are moved from one plate to the other, what is the electric field between the plates?

## Homework Equations

$$\vec E(P) = \frac{1}{4\pi {\varepsilon}_0}\int_{Surface} \frac{\sigma dA}{r^2}\hat r$$

## The Attempt at a Solution

I thought of summing the electric field between the two plates, but I do not know the surface charge density ##(\sigma)##, and I do not know how to incorporate the ##10^{-11}## electrons into the equation.

Thank you in advance.

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