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Eddy Current Tubes

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Published on Jun 3, 2009

http://www.TeacherSource.com Drop neodymium magnets down these large diameter, thick-walled copper and aluminum tubes, and watch them twist and turn as they slowly fall. A moving magnetic field creates a surprisingly strong opposing magnetic field in these tubular conductors. The length of the heavy-walled aluminum tube is calculated so that magnets take the same time to fall as the shorter copper tube. Available at Educational Innovations.

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