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Homework Help: Induced emf in a coil

  1. Mar 25, 2010 #1
    1. The problem statement, all variables and given/known data
    A coil is wrapped with 247 turns of wire on the perimeter of a square frame of sides 27.3 cm. Each turn has the same area, equal to that of the frame, and the total resistance of the coil is 2.53. A uniform magnetic field is turnedon perpendicular to the plane of the coil. If the field changes linearly from 0 to 1.11Wb/m2 in a time of 0.822 s, find the magnitude of the induced emf in the coil while the field is changing.
    Answer in units of V.​

    2. Relevant equations
    flux = B*a*cos(theta)
    E = -N (flux/t)

    3. The attempt at a solution
    flux = (1.11)(745.29)(1/10000) = .074529
    E = (247)(.074529)/(.822) = 22.395
    Just not sure if it is right or not
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 27, 2010 #2

    Redbelly98

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    Homework Helper

    Welcome to PF :smile:

    Looks good!
     
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