Electric Potential Video Lessons

Concept

# Problem: A -10.0nC point charge and a +20.0nC point charge are 15.0cm apart on the x-axis. What is the electric potential at the point on the x-axis where the electric field is zero? What is the magnitude of the electric field at the point on the x-axis, between the charges, where the electric potential is zero? What is the direction of the electric field at the point on the x-axis, between the charges, where the electric potential is zero?

###### FREE Expert Solution

Let's consider point P to be at a distance d to the left of the first charge.

Electric field:

$\overline{){\mathbf{E}}{\mathbf{=}}\frac{\mathbf{k}\mathbf{q}}{{\mathbf{r}}^{\mathbf{2}}}}$

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###### Problem Details

A -10.0nC point charge and a +20.0nC point charge are 15.0cm apart on the x-axis. What is the electric potential at the point on the x-axis where the electric field is zero? What is the magnitude of the electric field at the point on the x-axis, between the charges, where the electric potential is zero? What is the direction of the electric field at the point on the x-axis, between the charges, where the electric potential is zero?