Do different materials like non-magnetic stainless, aluminium or brass have different values in relation to Lenz's law?
Is there more drag against aluminium as opposed to brass and/or stainless?
If so, which metallic materials have the least drag?
Thanks in advance?
The laws remain static but the changes in permeability of the materials mean the reaction can increase or decrease relative the the permeability of the material. A motor for instance with a lower permeability core will produce less output than the same motor with the higher permeability material and this is true for generators ( though some may dispute this ). This link will give you a good start on your path to understanding ....
http://en.wikipedia.org/wiki/Permeability_(electromagnetism (http://en.wikipedia.org/wiki/Permeability_(electromagnetism))
Garry
Cool, so the higher the permeability of a material the stronger the drag against a magnet.
Meaning a magnet dropped through an aluminium tube moves faster than a nickel tube, faster than steel -> ferrite -> permalloy -> Mu-metal -> Metglas.
That's easy, thanks.
Far as I can tell brass has a higher permeability than aluminium.
http://en.wikipedia.org/wiki/Permeability_%28electromagnetism%29 (http://en.wikipedia.org/wiki/Permeability_%28electromagnetism%29)
http://www.pupman.com/listarchives/2003/April/msg00542.html (http://www.pupman.com/listarchives/2003/April/msg00542.html)