Are the Lenz's law values different for different materials?

[rukiddingme]

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?

[ruin41]

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)
Garry

[rukiddingme]

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://www.pupman.com/listarchives/2003/April/msg00542.html