Homework Help: Physics repost

Posted by Mary on Thursday, October 11, 2007 at 11:15pm.

I know I have posted this question before but I have tried everything under the sun to no avail. Please help a clueless student!!!!

A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 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.
__________J

Physics repost - bobpursley, Friday, October 12, 2007 at 5:28am
Find the emf with faradays law:

emf=-N*area*dB/dt

then, power= emf^2/resistance

where resistance= resistance/length*2PI*radius

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