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Force on current carrying wire

  1. May 21, 2009 #1
    A straight wire of length 90 cm carries a current of 60 A and makes an angle of 45 degrees with a uniform magnetic field. If the force on the wire is 2.0 N what is the magnitude of B.

    my attempt:
    F=BIL
    2=B(6)(.90)
    B=.37
    What am i doing wrong?
     
  2. jcsd
  3. May 21, 2009 #2

    rock.freak667

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    Homework Helper

    F=BIL is assuming the conductor is at 90 degrees to the magnetic field.

    if it is at an angle [itex]\theta[/itex], then the formula becomes [itex]F=BILsin\theta[/itex]
     
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