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Homework Help: Magnetic Force Direction Question

  1. Dec 8, 2011 #1
    1. The problem statement, all variables and given/known data
    r= 0.12m
    B = 0.0720T
    I = 21.0A
    Fm= 0.104 N [up]

    A magnetic force of 0.104 N [up] acts on a 12.0cm long wire that runs[N 10 degrees E] through a magnetic field of 0.0720 T. If the current in the wire is 21.0 A, then what is the direction of the magnetic field?

    This physics Level is 4U in Canada, or grade 12.

    2. Relevant equations
    B = IlBsin(theta)
    Not sure what other equations to use.
    Right hand rule might be relevant but not sure how to apply it.

    3. The attempt at a solution
    I am completely stumped and do not know where to start.
  2. jcsd
  3. Dec 8, 2011 #2
    You need an equation between magnetic field strength and magnetic force. And watch out because you need to know directions of these vectors as well as just a formula.
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