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Homework Help: Magnetic field

  1. Jun 3, 2008 #1
    The conductor shown in the figure is turned so as to form a middle circle with r radius.It is rotated at f frequence in a magnetic field with B inductivity.Find the amplitude of the voltage and the ampitude of the induced current in the conductor if the inside resistance of the amperometer A is R and the resistence of the circuit is negligible.
     

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  3. Jun 4, 2008 #2
    Any idea please?
    How does flux change there?
     
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