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Asking about direction of magnetic force

  1. Jul 28, 2005 #1
    I have a problem with a question that asked me to give the direction of magnetic force of a long wire with a current flowing from west to east horizontally with a magneitc field pointing into the page. What is the direction of the force and the motion afterwards?
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  3. Jul 28, 2005 #2


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    The wire is made out of electrons flowing in the direction opposite of that of the current. What is the formula for the magnetic force on an moving charge?
  4. Jul 28, 2005 #3


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    Use Fleming's left hand rule.
  5. Jul 29, 2005 #4
    But after opplying the rule, my thumb point in a direction that's away from me. But the suggested answer that the force is pointing upwards. How come?
  6. Jul 29, 2005 #5


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    Follow the direction as on a map.

    current is west to east means from left to right(middle finger)
    magnetic field is into the paper (index finger)
    where the thumb points? Is it upward

    Dont confused with hand. Left hand.
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