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Work done by a moving conductor in a magnetic field

  1. Mar 17, 2010 #1
    1. The problem statement, all variables and given/known data

    Show that there is a force of 0.1N on a conductor of length 100mm carrying a current of 10A at right angles to a flux density of 0.1T.

    Show that 0.1J of work is done if the conductor is displaced by 100mm at right angles to its length.

    2. Relevant equations

    F=BIL
    W=Fd

    3. The attempt at a solution

    I think this should be very straightforward, but the second bit confuses me. For the first bit I simply have:

    F=BIL
    F=0.1 x 0.1 x 10 = 0.1N

    That's easy, but then for the second part concerning work I would imagine that:

    W=Fd
    W=0.1N x 0.1m = 0.01J

    However the question says that the answer should be 0.1J of work. Is this a misprint or am I missing something really fundamental?

    Thanks in advance.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 17, 2010 #2

    ideasrule

    User Avatar
    Homework Helper

    Yes, it's a misprint.
     
  4. Mar 18, 2010 #3
    Thanks! Good to know.
     
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