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question 31

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Use the following figure for the next problem:  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<sup>-5</sup> J C) 1.1 J D) 1.8  \times  10<sup>-</sup><sup>4</sup> J E) None of these is correct.
-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


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