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Net magnetic force in unit-vector notation

  1. Nov 17, 2008 #1
    1. The problem statement, all variables and given/known data
    The bent wire shown in the figure below lies in a uniform magnetic field. Each straight section is 2.0 m long and makes an angle of θ = 65° with the x axis, and the wire carries a current of 2.0 A. 28-39.gif

    (a) What is the net magnetic force on the wire in unit-vector notation if the magnetic field is 4.0k^T?
    magnitude [answer] N , direction [ ]

    2. Relevant equations
    FB = iLBsin(phi)

    3. The attempt at a solution
    given i = 2A, L = 2m, B=4kT sin(θ) = 65° i got 2*2*4*sin(65) = 14.5 * 2 for other wire = 29N
    Last edited: Nov 17, 2008
  2. jcsd
  3. Nov 18, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    This gives you the magnitude of the force on the wire segment. Note that phi is the angle between iL and B. What direction is the B field?

    What's the direction of the magnetic force on the wire segment? (Use the right hand rule.)
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