Use the Following Figure for the Next Problem

question 36

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 it has a terminal velocity of 10 cm/s.The length of the pipe is 80 cm.What is the magnitude of the magnetic force on the magnet when it is falling at the terminal velocity?

• A)0.35 N
• B)0.79 N
• C)0.97 N
• D)0.69 N
• E)None of these is correct.

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