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!

HELP conducting sphere

  1. Mar 29, 2008 #1
    1. The problem statement, all variables and given/known data

    Show that the energy associated with a conducting sphere of radius R and charge q surronded by a vacuum is given by u=kq^2/(2R).

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Mar 29, 2008 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    What have you attempted thus far?
  4. Mar 30, 2008 #3
    i couldnt do anything. what is u ?where does it come from i dont understand :( pls help me and sorry for my english i dont know perfect english
  5. Mar 30, 2008 #4


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF jennyyyy. U is just the name used to denote the energy you are asked to calculate:
    Are you using a book for your electrodynamics course, or lecture notes? Surely there must be something about energy in there, like a formula you could use.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook