Answer to Question #261473 in Electricity and Magnetism for kim

Question

Find the electric field in a charge free region if it is pointing along the z-direction repeat this for a region having a charge density.

Answer 1

$E=\frac{kQ}{r^3}{r}$

$r=r\hat{k}$

Charge density

$\rho=\frac{Q}{A}$

$Q=\rho A$

Now electric field

$E=\frac{k\rho A}{r^3}r\hat{k}$