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Homework Help: EMF induced in loop

  1. May 30, 2010 #1
    1. The problem statement, all variables and given/known data
    C
    alculate the emf (in volts) induced in a loop of wire if the magnetic flux in the loop increases from zero to 71.1 milliweber in 16.7 millisec.



    2. Relevant equations

    faradays Law

    3. The attempt at a solution

    The only law I know is faradays law which uses Area. Is there another formular that does not need it?
     
  2. jcsd
  3. May 31, 2010 #2
    Faraday's Law is the only one that links the induced EMF to the change in Magnetic Flux, why would you want to use anything else?

    [tex]\mathcal{E} = -\frac{d\Phi_B}{dt}[/tex]

    You're given the change in the magnetic flux (Remember, one Weber is one Tesla * m^2) and the time over which the change occurred in this question.
     
  4. May 31, 2010 #3
    So would it just be

    71.1mWb / 16.7 ms = 4.25 mV ?
     
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