J M Bostock-Smith 2008 Phys. Educ. 43 265 doi:10.1088/0031-9120/43/3/002
The jumping ring and Lenz's law—an analysis
J M Bostock-Smith
Show affiliationsLenz's law is sometimes invoked to explain the behaviour of the jumping, or levitating, ring. This is shown to be incomplete, and an alternative explanation using Faraday's laws and circuit analysis is offered. This leads to the choice of optimum material and dimensions for the ring.
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Issue 3 (May 2008)
Received 6 November 2007, in final form 14 January 2008
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The jumping ring and Lenz's law—an analysis
J M Bostock-Smith 2008 Phys. Educ. 43 265
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