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Charged ball within spherical shell charge problem

  1. Sep 14, 2012 #1
    1. The problem statement, all variables and given/known data

    A small charged ball lies within the hollow of a metallic spherical shell of radius R. Here, for three situations, are the net charges on the ball and shell, respectively:

    1 +4q, 0
    2 -6q, +10q
    3 +16q, -12q

    (a) Rank the situations according to the charge on the inner surface of the shell, most positive first (use only the symbols > or =, for example 2=3>1).
    Incorrect: Your answer is incorrect.

    (b) Rank the situations according to the charge on the outer surface, most positive first (use only the symbols > or =, for example 2=3>1).





    The attempt at a solution

    I found part b.) to be 1=2=3 but I'm not sure how I would go about doing part a.)
     
  2. jcsd
  3. Sep 14, 2012 #2

    SammyS

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    What do you get for the amount of charge on the inner surface of the shell in each case?

    (Use Gauss's Law.)
     
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