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Basic EMF question

  1. Aug 23, 2009 #1
    1. The problem statement, all variables and given/known data

    S is a disk of Area 0.003m2, B is a magnetic field perpendicular to S and increasing at 0.02 T per second. What is the EMF in the perimeter of S?

    2. Relevant equations

    I assume we need a formula relating Area, B and emf - Faraday's law of induction? or possibly phi = BAcos(phi)

    3. The attempt at a solution

    phi - BxA = .003x.02 = .00006

    E = -N(phi)/t

    t = 1 second
    N = 1
    therefore E = -.00006

    is this right? what are the units of EMF?
  2. jcsd
  3. Aug 23, 2009 #2


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    Science Advisor
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    Gold Member

    You have all the ingredients to put it together. The units of emf are Volts.
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