Answer to Question #298824 in Physics for Salome

Question

A square metal plate with a length of 0.20 m and with a charge of 9.7 x 10 -7 C.

Find the electric field of the square metal plate.

Answer 1

The electric field of a charged plate

$$E=\frac{\sigma}{2\epsilon_0}=\frac{Q}{2\epsilon_0 A}$$

$$E=\frac{9.7* 10^{ -7}}{2*8.85*10^{-12}*(0.20)^2}=1.37*10^6\:\rm V/m$$