Re: [Phys-l] Is skin efffect a factor?

[chuck britton <cvbritton@embarqmail.com>]

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.
> _______________________________________________