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Homework Help: Path of Electron

  1. Sep 30, 2008 #1
    1. The problem statement, all variables and given/known data

    The original direction of the electron beam as it enters the magnetic field is along the earth’s magnetic field. If the magnitude of the earth’s magnetic field is 0.1 mT and the magnetic field due to the Helmholtz coils is 1.0 mT (perpendicular to the electron beam), the resulting path of the electron can be best described as:

    2. Relevant equations

    I have no idea where to begin.

    3. The attempt at a solution

    I guessed it would be circular but that is wrong.
  2. jcsd
  3. Oct 1, 2008 #2


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    Homework Helper

    Uh, where did the Helmholtz coils come into the picture? Is this the question in its entirety?
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