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Electric fields true or false question

  1. Feb 4, 2008 #1
    1. The problem statement, all variables and given/known data

    The electric fields created by a point charge, a conducting sphere and insulator sphere are identical, if they all have the same amount of charge and the field is measured outside the spheres.

    2. Relevant equations

    3. The attempt at a solution

    I think its false...but how can you explain it
  2. jcsd
  3. Feb 4, 2008 #2

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    What is the field (magnitude and direction) at a point, at a distance r from the centre, outside a uniformly charged hollow shell of infinitesimal thickness, if the total charge is q?
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