# What is the Coulomb's law?

Apr 21, 2018

$F = k \frac{{Q}_{1} , {Q}_{2}}{r} ^ 2$

#### Explanation:

assume there are two charges ${Q}_{1} , {Q}_{2}$

the force between them can be found through this relation

$F = k \frac{{Q}_{1} \cdot {Q}_{2}}{r} ^ 2$

Where k is Coulomb's constant
and $r$ is the distance between the two charges

and the force is attraction if the two charges have different sign
($+ v e \mathmr{and} - v e$)
and repulsion if the two charges have the same sign