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!

Potential energy - Purcell

  1. Jun 18, 2006 #1
    A spherical volume of radius, a, is filled with charge of uniform density, p. We want to know the potential energy, U, of this sphere of charge, that is, the work done in assembling it. Calculate it by building the sphere up layer by layer, making use of the fact that the field outside a spherical distribution of charge is the same as if all the charge were at the center. Express the result in terms of the total charge, Q, in the sphere.
  2. jcsd
  3. Jun 18, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    That was a nice rendition of your exercise question!

    Now, going over to the really big issue:
    Have you done anything at all?
  4. Jun 18, 2006 #3
    Exercise question? This is not for school dude...it's june, school is over. I'm working out of a book called Electricity and Magnetism by Purcell, by myself, and have gotten stuck on this question. Thank you so much for being helpful.
  5. Jun 19, 2006 #4


    User Avatar
    Homework Helper
    Gold Member

    The forum rules require you to show your work (or thoughts/ideas) before you get help.

    Also, if you drop the sarcasm, people might be more tempted to help :smile:
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Potential energy - Purcell
  1. Potential Energy (Replies: 15)

  2. Potential energy (Replies: 1)

  3. Potential Energy (Replies: 1)

  4. Potential energy (Replies: 4)