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Electron moving toward an magnetic field

  1. Dec 8, 2013 #1
    If there is an electron moving towards an long straight wire at an angle theta. I am given the initial velocity of the electron and the distance it has to travel before being repelled away in the same plane. How would I go about finding the current in the wire required to repel the electron?
    I know that the magnetic field for a long wire is given by uI/2pir .

    I am wondering how to relate the speed of the electron to the strength of the magnetic field.
     
  2. jcsd
  3. Dec 9, 2013 #2
    Do you know the relationship between the magnetic force acting on the electron, the magnetic field strength, and the velocity of the electron?
     
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