# 1 Volt?

1. Feb 17, 2010

### p.tryon

How far do you need to separate two opposite 1C charges inorder for the potential difference to be 1v?

2. Feb 17, 2010

### Born2bwire

It's completely arbitrary as the potential would vary with distance from the charges. When you say potential difference though, what is your reference potential then? Is it assuming 0 V at infinity? If so then the potential that results from a point charge is trivial:

$$\Phi = \frac{1}{4\pi\epsilon_0}\frac{q}{r}$$