Oh, it was also brought to my attention that the way that the ring rotates isn't exactly clear. I'll try to explain this the best I can:
Set the H to be going in the positive Z direction. It rotates about the Y axis into the X axis. Say Z is up, Y is left and right, and X comes out of the...
Thanks that's definitely a good start, whether its a wild goose chase or not, I've been busy for the last hour. I'll let you know if I reach a dead end, or the answer. Anything else you can add to the problem would help greatly. o:)
Thanks for the nudge.
Homework Statement
A thin copper ring rotates about an axis perpendicular to a uniform magnetic field H_{0} =200G. Its initial frequency of rotation is \omega_{0} . Calculate the time it takes the frequency to decrease to 1/e of its original value under the assumption that the energy...