Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates

Question

Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude $17.0 	imes 10^{-22}	ext{ C/m}^2$. What is the electric field between the plates?

Professor PC Thomas Classes · Answer

Between two oppositely charged parallel plates, the electric field is $E = \frac{\sigma}{2\epsilon_0} + \frac{\sigma}{2\epsilon_0} = \frac{\sigma}{\epsilon_0} = \frac{17.0 	imes 10^{-22}}{8.854 	imes 10^{-12}} \approx 1.9 	imes 10^{-10}	ext{ N/C}$.