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Why i have forces vectors up and down

  1. Jul 30, 2009 #1

    they are supposed to be inide and outside the page

    come come they go to be up and down


    (you can left click in order to zoom)
  2. jcsd
  3. Jul 30, 2009 #2


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    Staff: Mentor

    The forces on the moving charges in the wires will be orthogonal to both the B-field direction and the direction of the motion of the charges. Hence, the forces have to be up and down in that diagram, since both B and the current directions lie in the plane of the page.

    Use the equation F = q v X B to help you get a feel for the directions involved. Use the right-hand rule for that cross product in order to get the correct force direction. Does that make sense now?
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