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So if I wiggle magnet up and down at NINE Hz - then 1/2 inch will do
as well.
On Jun 5, 2009, at Jun 5(Fri) 12:55 , Bernard Cleyet wrote:
A typical back EMF demo is to drop a magnet on to a conducting_______________________________________________
plate. One inch thick Cu cooled w/ LN2 is usual. I wonder; will
1/2 inch thick work as well and, if so, because of skin effect?
bc
p.s. Skin depth for 77K Cu is one inch at ~ 3 Hz.
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