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Why i have forces vectors up and down

  1. Jul 30, 2009 #1
    http://i32.tinypic.com/rclu8z.gif

    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

    berkeman

    User Avatar

    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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