1. Not finding help here? Sign up for a free 30min 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!

Sphere inside a shell.

  1. Feb 22, 2010 #1
    A solid sphere of radius a = 3.00 cm is concentric with a spherical conducting shell of inner radius b = 2.00a and outer radius c = 2.40a. The sphere has a net uniform charge q1 = +4.33 fC; the shell has a net charge q2 = –q1.

    What is the magnitude of the electric field at a distance r = a/2 from the center of the sphere?

    ___

    Well, I thought the answer was 0 because as I know, the electric field inside a conductor is zero, and the sphere is a conductor. So anywhere in the sphere will have zero charge, since all the charge moves to the surface of the sphere. But, the answer is not zero. Why is this? I'm just so entirely confused with when E is zero and when it is not.

    Thanks.
     
  2. jcsd
  3. Feb 23, 2010 #2

    ehild

    User Avatar
    Homework Helper
    Gold Member

    It was not said that the solid sphere was a conductor.

    ehild
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Sphere inside a shell.
Loading...