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Homework Help: Determine magnetic field of a bar magnet

  1. Mar 31, 2014 #1
    1. It is desired to determine the magnetic field of a bar magnet. The bar magnet is pushed through a 10.0-cm diameter circular coil in 2.50 × 10-3 s and an emf of 0.750 V is obtained. Find the magnetic field of the bar magnet.

    ε = 0.750 V
    d=0.10 m
    t=2.50x10-3 s

    2. Relevant equations
    ε = RI
    A= 7.85x10-3 m2
    B= [itex]\phi[/itex]/Acos[itex]\theta[/itex]
  2. jcsd
  3. Mar 31, 2014 #2


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