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Re: [Phys-L] Lenz's law and conservation of energy



On Apr 4, 2014, at 9:59 AM, John Denker wrote:

First, some possibly-helpful remarks:

My favorite demonstration of Lenz's law is the "jumping
ring" demo.
http://www.rpi.edu/dept/phys/Dept2/physlabsite/demoFaradayjumpingring.htm

Advantages include
-- There is no doubt that it demonstrates Lenz's law,
namely it verifies the /sign/ of the induced current.
The sign is such that the ring moves /away/ from the
high-field region.
-- All the important parts are out where you can see
them.


An interesting article about Lenz's law and the jumping ring demo:
http://scitation.aip.org/content/aapt/journal/tpt/46/6/10.1119/1.2971219

Larry