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Homework Help: Magnetism and Electrons

  1. Oct 31, 2006 #1
    An electron is placed in a magnetic field B that is directed along a z axis. The energy difference between parallel and antiparallel alignments of the z component of the electron's spin magnetic moment with B is 4.50 10-25 J. What is the magnitude of B?

    energy=Beh/4pim 4.5e-25 = B (1.6e-19)(6.626e-34)/ 4pi 9.109e-31


    B=.0485 T
    B =48.5 mT

    But this seems to be wrong???
  2. jcsd
  3. Nov 3, 2006 #2
    I have also tried -48.5mT but that is wrong also
  4. Nov 3, 2006 #3


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    Science Advisor
    Homework Helper

    Is it because the problem is giving youthe energy difference between the two alignments?
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