On Thu, Sep 6, 2012 at 5:25 PM, <[email protected]> wrote: > In reply to Jouni Valkonen's message of Thu, 6 Sep 2012 19:05:33 +0300: > Hi, > >Stored energy in magnetic field for neodymium magnet is around 40-50 MGOe. > >As one MGOe is 7960 J / m³, this means that energy stored in 1 cm³ > >neodymium magnet is 360 millijoules. That is, it is negligible for all > >practical purposes and certainly this field energy is not the source why > >permanent magnets can do work. > > > >—Jouni > [snip] > As I said. ;) However I'm not certain that the volume of the actual magnet > is > the appropriate volume (though I think it is). >
I think you're correct. The energy stored in a magnetic field is very much like that stored in a pressurized gas. Hence the term "magnetic pressure<http://en.wikipedia.org/wiki/Magnetic_pressure> ".
