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Magnets and charge

  1. Feb 12, 2009 #1
    1. The problem statement, all variables and given/known data
    a bar of magnet is hung from a string through its center. A charged
    rod is slowly brought up into the positions shown(down)
    in what direstion will the magnet tend to rotate?
    Suppose the charged rod were replaced by a bar magnet with the north pole on top.

    N magnet S

    +

    <<<< rod

    -


    2. Relevant equations
    in what direstion will the magnet tend to rotate? Is there a difference between what happens to the hanging magnet in the 2 situations? Explain why you either do or do not think so


    3. The attempt at a solution

    The positive charge of the rod will repell the magnet and it will rotate clockwise
    if the rod were to be replace it will be the same
    is it right?
     
  2. jcsd
  3. Feb 12, 2009 #2
    What is the charge of the rod?
     
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