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!

Homework Help: An old nugget of a question: potential nucleus due to uniform charge sphere.

  1. Apr 3, 2008 #1
    1. The problem statement, all variables and given/known data

    Ast stated above: Biut i just cant get the correct answer!

    radius of sphere = a

    charge ze contained

    2. Relevant equations

    by gauss: E= (ze)*r/4pi(epsilon)*a^3 at any point within the sphere.



    Energy density= 0.5*epsilon*E^2

    3. The attempt at a solution

    letting energy= integral(energy density)dv

    with limits: r= 0-a, theta= 0-pi, phi=0- 2pi

    i get wrong answer:

    (ze)^2/80epsilon*pi*a ration between top and bottom, should be 3(ze)^2/20epsilon*pi*a any ideas?

    many thanks!
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted