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Homework Help: EMF in a Generator

  1. Sep 5, 2010 #1
    1. The problem statement, all variables and given/known data
    A generator has a 170-turn square coil, 5 cm on a side.
    Find the peak emf in this coil when it's rotating at 90.0 Hz in Earth's field, 5*10^-5 T
    Express your answer to one significant figure and include the appropriate units.

    2. Relevant equations

    Emf = NBAw

    3. The attempt at a solution

    N = 170
    B = 5*10^-5
    A = 0.05^2 = 0.0025m^2
    w = 2*pi*f = 565.49

    subbing in, emf = 0.012V

    BUT. mastering physics is telling me its wrong.
  2. jcsd
  3. Sep 5, 2010 #2


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    Homework Helper

    Try 12.0 mV.
  4. Sep 5, 2010 #3
    nope, wrong.
  5. Sep 5, 2010 #4
    nevermind, its 10mV... they dont seem to care for accuracy.
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