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Electric field help please

  1. Sep 14, 2009 #1
    1. The problem statement, all variables and given/known data
    calculate the electric field strength 0.3m from the centre of a small metal sphere cArying a charge of +5.0810^-6


    2. Relevant equations



    3. The attempt at a solution
    TRIED putting into f = q1q2k/d^2 with q1 and q2 both being the known charge, but did not work

    any help is appreciated thanks
     
  2. jcsd
  3. Sep 14, 2009 #2

    rl.bhat

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    How you define electric field?
     
  4. Sep 14, 2009 #3
    i don't know what you mean the entire question is written out.
     
  5. Sep 14, 2009 #4

    rl.bhat

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    What is the expression for an electric field at a point d from a charge q?
    In the problem only one charge is given.
     
  6. Sep 14, 2009 #5
    not sure, thats the question given. maybe its not right.
     
  7. Sep 14, 2009 #6
    dont worry i figured it out myself it was E = kq/d^2
    thanks anyway.
     
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