Use the Following Figure for the Next Problem:
-A $\times$

Multiple Choice

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 $\times$ 10^-5 J
C) 1.1 J
D) 1.8 $\times$ 10^-4 J
E) None of these is correct.