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Homework Help: Physics magnet conceptual question

  1. Feb 29, 2012 #1
    1. The problem statement, all variables and given/known data
    The figure shows a wire that is connected to a power supply and suspended between the poles of a magnet. When the switch is closed, the wire deflects in the direction shown.

    Which of the dashed boxes A–D represents the position of the north magnetic pole?


    2. Relevant equations

    Right hand rule?

    3. The attempt at a solution
    When I attempt the right hand rule and line my thumb up with the wire I don't see how the wire could deflect downward. Shouldn't it be right or left deflection?

    I must be missing something
     
  2. jcsd
  3. Mar 1, 2012 #2
    bump... help me understand this
     
  4. Mar 1, 2012 #3
    anyone? I don't know how to go about this... and yes I've read the chapter
     
  5. Mar 12, 2012 #4
    It's more accurate if you use your

    index finger (current)
    thumb (force)
    middle finger (magnetic field).

    You, however, are lacking the picture or a more detailed description of the problem. This is probably why no one has responded.
     
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