# Homework Help: Electric Potential Problem - Fixed Template

1. Jun 24, 2015

### Zackkkkkk

1. The problem statement, all variables and given/known data
An electric charge q1 (-6e) is located at the origin. A second electric charge q2 (+2e) is located a distance "d" from the origin. In terms of "d", what is the distance "x" from q1 where the net electric potential is zero? Assume for this problem that x<d.

2.Relevant equations
I need a solid explanation on how to do this problem properly. I have a strong feeling that this can't be right (my attempt). I need to be able to understand and work problems like this for my upcoming exam. Any help would be appreciated.

3. The attempt at a solution
Vtotal = V1 + V2.
If Vtotal = 0 then V1+V2=0.
V1-V2
kq1/x = - kq2/d-x
q1/x = - q2/d-x
(q1(d-x))/(-q2) = x
3(d-x) = x
3d = 4x
(3d/4) = x

2. Jun 24, 2015

### SammyS

Staff Emeritus
Other than what appears to be a typo above, and the lack of some needed sets of parentheses, that looks good.

I'm pretty sure that the final answer is correct.

3. Jun 24, 2015

### Zackkkkkk

Thank you for your input, friend.