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Magnetic Field; Matrix

  1. Mar 30, 2009 #1
    1. The problem statement, all variables and given/known data
    An electron moves through a uniform magnetic field given by B = Bxi+(3.0Bx)j. At a particular instant, the electron has velocity v = (2.0i+4.0j)m/s and the magnetic force acting on it is (6.4x10-19N)k. Find Bx.

    2. Relevant equations

    Fb=|q|v x B

    3. The attempt at a solution

    B = Bxi + (3Bx)j + 0zk
    v = 2xi + 4yj + 0zk
    Fb = 0xi + 0yj + (6.4 * 10^[-19]N)k

    I'm sure I need a matrix. But i can't figure it out, help!
     
  2. jcsd
  3. Mar 30, 2009 #2
    solved.
     
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