Question

. Determine the force (per unit area) which two like-charged infinitely long planes having the same charge surface density of 3 x 10^-8 C/cm2 will repel each other with

Answer 1

Answer

charge surface density of

$\sigma=3 *10^{-4 }C/m^2$

the force (per unit area) which two like-charged infinitely long planes

Is given by

$\frac{F}{A}=\frac{\sigma^2}{2\epsilon_0}$

Putting all values

$$\frac{F}{A}=\frac{ (3 *10^{-4 } ) ^2}{2\times8.85*10^{-12}}$$

$=5084.7N/m^2$