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Is my works right

  1. Oct 29, 2006 #1
    I Have two set of Qs i worked throu. & i am not sure of my works
    am i on the right tuck
     

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  3. Oct 30, 2006 #2

    OlderDan

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    In #1, your comment (average flux) is not correct. It is not an average, it is a difference.

    In #2, what is the basis of the equation you used for E?
     
  4. Oct 30, 2006 #3
    So #1 is right, only the comment (average flux) is wronge??

    in #2 i used farady's law( E 2pi r= -the rate of change of flux), for induced electric field:

    E (2pi r)= -(pi R^2 dB/dt)/2r

    E=1/2r* dB/dt *R^2

    this is E
     
  5. Oct 30, 2006 #4

    OlderDan

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    In #1 you also failed to include the number of turns of wire in the coil. Other than that it is good.

    You need to take another look at Faraday's law. The flux involved is the flux through the closed path of the E•ds integral.
     
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