7.6 Exercise 36

Two parallel conducting plates, each of cross-sectional area $400 \text{cm}^{2}$, are 2.0 cm apart and uncharged. If $1.0 \times 10^{12}$ electrons are transferred from one plate to the other, (a) what is the potential difference between the plates? (b) What is the potential difference between the positive plate and a point 1.25 cm from it that is between the plates?