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Homework Help: Flux and EMF

  1. Feb 27, 2005 #1
    I don't see the point why EMF is maximum when the Area vector is at a 90 degree angle with the magnetic field (B)

    I know that when you consider the equation EMF = NBAw sin(wt) it will show an oscillation with the max when sin(wt) = + or - 1

    but when I think about it........
    according to Farraday, EMF = -N delta Phi/ delta t
    with constant angular velocity, the "change" in flux per unit time is going to be the same no matter what
    i do understand that the flux value would be different, but the change would be constant
    if this is the case, then EMF should always be constant then
    so, how does this apply to ac?

    where am I wrong on this? I'm already soooo confused?
    maybe i should stick with Organic Chemistry :confused:
  2. jcsd
  3. Feb 27, 2005 #2
    i got it, i forgot that farraday's equation is the average EMF over a time interval
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