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Homework Help: Magnetic Force on a Charge

  1. Sep 20, 2012 #1

    So, applying the left hand rule I got a force into the page for the question attached. The markscheme, however, claims it is out of the paper.

    Can anyone help me understand why?


    Attached Files:

  2. jcsd
  3. Sep 20, 2012 #2


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    Homework Helper

    If I remember correctly, the convention for flow of current would be the direction in which a positive charge would travel if placed at that point. So the field would be to the left and the current would be downwards leading to the force being into the paper.
  4. Sep 20, 2012 #3
    Yea, that's what I thought too! They must have forgotten they put an electron there...
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