On Sat, Jun 27, 2009 at 1:14 PM, William Beaty <bi...@eskimo.com> wrote:
> On Sat, 27 Jun 2009, John Berry wrote: > > > >From the stationary view point a magnetic dipole would be created only > if > > electron drift tended not to spiral. > > Then a simple spiral-shaped coil would not produce a magnetic dipole. No, you misunderstand what I was saying. In a spiral shaped coil the protons aren't moving in a circle producing a magnetic field, here they are, the opposite to that produced by the electrons hence no field from the electrons to a stationary frame. However IF due to the voltage gradient the electron drift takes a less rotational path than the protons then you will have more rotating protons than electrons and hence you will have a magnetic field. Production of the dipole magnetic field seems likely just not quite the way that seems most obvious.
