1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Dipole Moment Integration Question

  1. Feb 22, 2014 #1
    In "An Introduction to Electrodynamics", Griffiths gives the following equation for the dipole moment: [itex]p=\int r' \rho(r') d\tau'[/itex]. My question is, in general, what volume am I integrating over? It seems a bit arbitrary to me. I assume I'm integrating over whatever volume is enclosing the charge density [itex] \rho(r') [/itex]?
     
  2. jcsd
  3. Feb 22, 2014 #2

    TSny

    User Avatar
    Homework Helper
    Gold Member

    You are summing over all elements of volume ##\small d\tau'## in all of space. However, there is no need to integrate over those parts of space where the integrand is zero. So, you are correct - you only need to integrate over regions where there is some nonzero charge density.
     
  4. Feb 22, 2014 #3
    That makes sense to me. Thanks!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Dipole Moment Integration Question
  1. Dipole moment. (Replies: 5)

  2. Dipole Moment (Replies: 3)

  3. Dipole moment (Replies: 2)

  4. Dipole moment (Replies: 1)

  5. Dipole Moment (Replies: 23)

Loading...