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Help for easy electric problems

  1. Oct 3, 2005 #1
    A proton with speed v=3 . 10*5m/s , (.=coss) orbits just outside the charged sphere of radius = 1cm What is the charge of sphere?
  2. jcsd
  3. Oct 3, 2005 #2


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    What, exactly, have you done so far?
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