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Homework Help: Emf question

  1. Jul 31, 2006 #1
    A piece of copper wire is formed into a single circular loop of radius 9 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.45 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m. What is the average electrical energy dissipated in the resistance of the wire.

    I know the emf = 0.254 Volts.

    How do I find the energy dissipated?
  2. jcsd
  3. Jul 31, 2006 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Start by finding the current that flows through the wire.
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