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Homework Help: The potential at the center of the sphere

  1. Aug 12, 2014 #1
    1. The problem statement, all variables and given/known data

    the electric field at the surface of a charged, solid, copper sphere with radius 0.160m is 3600N/C , directed toward the center of the sphere.
    what is the potential at the center of the sphere, if we take the potential to be zero infinitely far from the sphere?
    answer in V

    . The attempt at a solution
    how to find the u and q thanks
  2. jcsd
  3. Aug 12, 2014 #2


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    Science Advisor
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    Think about what's the electric field inside the sphere (copper is a conductor!).
  4. Aug 12, 2014 #3
    Q=R^2E/k , v=kQ/R
    use these two?
  5. Aug 12, 2014 #4


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    Homework Helper

    Pretty sure there was a theorem that said the electric field inside an isolated conductor is zero, but the potential has the same value at all points on the surface whether inside the surface or not. That is, the potential is the same at the center as it would be anywhere else on the conductor.

    This is because the charge distributes itself uniformly on the surface of a spherical conductor.
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