Re: Magnetic Polarity Re: Magnetic quenching.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: dave pierson <davep-at-quik-dot-com> 

Tesla list wrote:

>Original poster: "Daniel Ullfig" <DUllfig-at-sbcglobal-dot-net>
>
> >     The definition of North Magnetic Pole is That Which Points Geographic
> >     North.  Period.
> >
> >     THIS means that the Earth's Geographic North Pole is associated with
> >     a SOUTH magnetic polarity there (actually: Northern Canada, or the
> >     nearby ice pack...  8)>>)
> >
> >     yes: it is counterintuitive and mind bending.  Also true..
> >     Had it cross checked by a physicist once.  For experimental
> >     verification:
> >     Wind a solenoid, observing 'left hand' rule for winding direction,
> >     connect DC PSU in Specified Polarity and check compass...
>
>
>The concept of north and south poles is completely arbitrary; Physicists
>could have started by saying "the earth is a giant magnet, and the north
>pole coincides with the magnetic north pole". then we would have decided
>that the south pole of a magnet is that which points to the north; finaly,
>when we discovered that electricity produces a magnetic field, we would have
>discovered the "right hand rule" instead of the "left hand rule", and it
>would all have worked out anyways. In physics, some rules are just
>arbitrary, and everyone agrees to them.

    Agreed.
    And the arbitray agreement, tho its not obvious, has the _NORTH_
      geiographic pole associated with a _south_ magnetic pole..

    best
     dwp