1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook