Coulomb's Law (Electric Force) Video Lessons

Concept

# Problem: A charge 3q is at the origin, and a charge -2q is on the positive x-axis at x = a. Where on the x-axis would you place a third charge with charge q so it would experience no net electric force?

###### FREE Expert Solution

In this question, we are required to apply Coulomb's law to evaluate the forces between charges.

Coulomb's law:

$\overline{){\mathbf{F}}{\mathbf{=}}\frac{\mathbf{k}{\mathbf{q}}_{\mathbf{1}}{\mathbf{q}}_{\mathbf{2}}}{{\mathbf{r}}^{\mathbf{2}}}}$

###### Problem Details

A charge 3q is at the origin, and a charge -2q is on the positive x-axis at = a. Where on the x-axis would you place a third charge with charge q so it would experience no net electric force?