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Faraday disk/ how is the magnetic flux changing?

  1. May 29, 2015 #1
    i can not seem to figure out how is the magnetic flux is changing and thus the current is induced , "A "is constant (same disk is spinning ) and "B" is constant and does not change , so how is the current induced ?
    and more specifically how is the change of magnetic flux is happening ?
    thanks for help .
  2. jcsd
  3. May 29, 2015 #2

    Simon Bridge

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    Welcome to PF;
    Who is claiming that the magnetic field must change?
    What happens to a charge moving through a magnetic field?
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