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Moving wires in magnetic field/force

  1. Mar 18, 2009 #1
    1. The problem statement, all variables and given/known data
    A long straight wire 1 lies along the x-axis. A long straight wire 2 lies along the y-axis so as
    to pass very near, but not quite touch wire 1 at the origin. If both wires are free to move, what happens when currents are sent simultaneously in the +x direction through wire 1 and in the +y direction through wire 2? Note that “clockwise around origin” refers to an observer looking down on an xy plane in which +x is to the right and +y upward.

    1. Both wires accelerate along the direction of current flow.
    2. 1 accelerates in the −y direction, 2 in the -x direction.
    3. Both wires rotate counterclockwise around the origin.
    4. 1 accelerates in the +y direction, 2 in the -x direction.
    5. Neither wire moves.
    6. 1 accelerates in the +y direction, 2 in the +x direction.
    7. 1 rotates counterclockwise, 2 clockwise around the origin.
    8. 1 accelerates in the −y direction, 2 in the +x direction.
    9. Both wires rotate clockwise around the origin.
    10. 1 rotates clockwise, 2 counterclockwise around the origin.

    2. Relevant equations
    None


    3. The attempt at a solution
    I tried using the Right hand rule (#1) to find out the direction of the magnetic field on both wires, then i used the Right hand rule (#2) to find out the direction of the force to find out how it would move. I ended up getting wire 1 moving into the page, which doesn't seem right and is not in one of the answer choices.
     
  2. jcsd
  3. Mar 22, 2009 #2
    Nevermind, Solved.
     
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