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: Two identical like-charged conductive spheres are placed very close

  1. Sep 7, 2009 #1
    1. The problem statement, all variables and given/known data
    Two identical like-charged conductive spheres are placed very close to each other, the charges willl redistribute themselves on the sphere's surface with an effective center-to-center distance rc so as to approximately satisfy the Coulomb's law, F = ke q1 q2 / (rc)^2. Is the value of rc larger or smaller than the physical center-to-center separation r between the two spheres? Explain

    2. Relevant equations

    3. The attempt at a solution
    I guess the surfaces between the spheres will become neutral, and the charges will redistribute on the other side in each sphere, then i have no idea what to do next with the question.
    I have not study for five years, forget most of them already, plz help, thx
    Last edited: Sep 7, 2009
  2. jcsd
  3. Sep 7, 2009 #2
    You're right. Due to repulsion, the charges will end up on the far ends of the spheres. Hence the distance between the charges will be greater than the center to center distance between the spheres.
  4. Sep 7, 2009 #3
    Okay, thanks very much
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook