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The Electric Field of a Ball of Uniform Charge Density

  1. Feb 26, 2008 #1
    1. The problem statement, all variables and given/known data
    Let E(r) represent the electric field due to the charged ball throughout all of space. Which of the following statements about the electric field are true?

    - E(0) = 0
    - E(Rb) = 0
    - lim(r -->infin.)E(r) = 0
    - The maximum electric field occurs when r = 0.
    - The maximum electric field occurs when r = Rb.
    - The maximum electric field occurs as r -->infin..

    2. Relevant material
    A solid ball of radius Rb has a uniform charge density rho .

    3. Attempt at a Solution
    The true statments that i chose were E(0) = 0, lim(r -->infin.)E(r) = 0, The maximum electric field occurs when r = Rb.
    Last edited: Feb 26, 2008
  2. jcsd
  3. Feb 26, 2008 #2


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    Homework Helper

    ...attempt at solution?
  4. Feb 26, 2008 #3


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    Your answers are correct.
  5. Feb 26, 2008 #4
    thank you
  6. Feb 28, 2008 #5
    how would u definte E(r) at distance r > rb?
  7. Feb 28, 2008 #6


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    For r>r_b, E is the same as a point charge.
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