(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 1.5 10-9 C charge is at the origin, and a -1.50 10-9 C charge is 4.5 m to the right on the positive x-axis. The electric potential is -1.8 V at a point on the x-axis that is a distance d to the right of the negative charge. Find d.

2. Relevant equations

V = k [sum] (q/r)

3. The attempt at a solution

-1.8V = k [(1.5 x 10-9 / 4.5 + x ) + (-1.5 x 10-9 / x )]

Maybe I'm doing the algebra incorrectly, but I continue to get the wrong answer although I think the set-up is correct.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electric Potential-finding unknown distance

**Physics Forums | Science Articles, Homework Help, Discussion**