Use the following figure for the next problem:
-A classic demonstration illustrating eddy currents is performed by dropping a permanent magnet inside a conducting cylinder.The magnet does not go into free fall.Instead it reaches terminal velocity and can take a few seconds to drop a length of about a meter.Suppose the mass of the magnet is 70 g and width of 1.0 cm.It falls with a terminal velocity of 10 cm/s and the length of the pipe is 80 cm.The magnitude of the Joule heating from the eddy currents is approximately
A) 0.55 J
B) 8.8 10-5 J
C) 1.1 J
D) 1.8 10-4 J
E) None of these is correct.
Correct Answer:
Verified
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