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

Charges +q and -q at points A and B respectively separated by distance R. Required to calculate the potential difference between these 2 points.

2. Relevant equations

I want to do in two ways.. i.e once by integrating the electric field and the other by directly finding the potential at the two points and then subtract them to have the difference

3. The attempt at a solution

Both of my trials have yielded a 2kq/0 which is a bit absurd...

I do like this>

V_{b}-V_{a}= - ((integration sign)kq/r^2 dr-(int.sign)kq/(R-r)^2 dr)

between the limits 0 to R.. It yields 2kq/0(wth!!)-2kq/R.....

So yeah.. I need help. Oh and K = 1/4pi e0

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

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: PD between +q and -q

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