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Faradays law: magnetic coil question

  1. May 30, 2007 #1
    1. The problem statement, all variables and given/known data
    (The information is for several questions and i have posted one of them)

    Two coils magnetically coupled, Voltage of 240v, 50Hz applied to coil 1, current of 2A flows, second coil connected only to a high impedance rms voltmeter reading 100v

    find: The peak total flux linkage with coil 1

    2. Relevant equations
    e = d{lamdar}/dt

    3. The attempt at a solution

    ok re-arranging the equation to find {lamdar} which is the flux linkage in coil 1


    e = 240 (as given)
    t = 1/f (and as radial 2 x pi x f) so t = 1/(2 x pi x f)
    t = 2.18... x10-3

    so {lamdar}= 0.7639 Wb-turns

    but the answer given say should be 1.079Wb-turns

    please help will be very gratefull have been at this for hours now.
  2. jcsd
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