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Homework Help: What is a test charge?

  1. Oct 2, 2007 #1
    1. The problem statement, all variables and given/known data
    When a problem says: "a test charge is placed at the origin" are we to assume its a positive charge?? (it doesn't say in this prob)
    If the question says that the test charge is Q = 0.6nC --then i should assume pos right?

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 2, 2007 #2

    learningphysics

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