1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Electric potential at the charge

  1. Oct 17, 2011 #1
    1. The problem statement, all variables and given/known data
    What should I do when I calculate the potential of point charges at the point of one of the point charges?

    2. Relevant equations
    The definition of a potential from point charges are:
    [tex] \phi(\textbf{r}) = (4\pi \epsilon_0)^{-1}\sum_{i}[q_i |\textbf{r}-\textbf{r}_{q_i}|^{-1}] + C [/tex]
    3. The attempt at a solution
    Setting [itex]q_i |\textbf{r}-\textbf{r}_{q_i}|^{-1}=0[/itex] when [itex]\textbf{r}-\textbf{r}_{q_i}=\textbf{0}[/itex]. Haven't seen this anywhere in the lecture material though, but I am guessing that is what one should do. If so, what is the "real" definition of the potential?
  2. jcsd
  3. Oct 17, 2011 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    The potential diverges as the location of the point charges. It's not defined there.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook