In a message dated 04/06/2008 03:42:49 GMT Daylight Time,  
paleoartifact@......... writes:

I put up  a illustration web photo and text page with two "imaginary ring 
magnets and a  imaginary coil".  Initially the subject delved only with the 2 
ring  magnets and a coil; but in two different polarity configurations.  In  
those 2 simple setup/s the question is, which would be better (?), as  is;....and 
initially without regard to adding end plates and cores/iron  rods/bolts.

_http://seismometer.googlepages.com/nssn_ 
(http://seismometer.googlepages.com/nssn) 



Hi Meredith,
 
    The field  insi  de  an axially  magnetised ring magnet, or inside a 
magnetised tube tends to lie almost  completely outsiide the cyli  nder. There is 
VERY LITTLE field inside the  cylinder itself.
 
    The reason whhy I suggested placing two ring  magnets end to end, is that 
this ~doubles the magnetising force which increases  the field in the gap of 
the system that I proposed. Think of the magnets as tiny  batteries in series 
and the field as electrical current in a poorly conducting  fluid. 
 
    Regards,
 
    Chris



   






In a message dated 04/06/2008 03:42:49 GMT Daylight Time,=20
paleoartifact@......... writes:
<=
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=3D2>I put up=20
  a illustration web photo and text page with two "imaginary ring magnets an=
d a=20
  imaginary coil".  Initially the subject delved only with the 2 ring=20
  magnets and a coil; but in two different polarity configurations.  In=
=20
  those 2 simple setup/s the question is, which would be better (?), as=20
  is;....and initially without regard to adding end plates and cores/iron=20
  rods/bolts.

http://seismometer.googlepages.com/nssn


Hi Meredith,
 
    The field  insi  de  an axi=
ally=20
magnetised ring magnet, or inside a magnetised tube tends to lie almost=20
completely outsiide the cyli  nder. There is VERY LITTLE field inside t=
he=20
cylinder itself.
 
    The reason whhy I suggested placing two ring=20
magnets end to end, is that this ~doubles the magnetising force which increa=
ses=20
the field in the gap of the system that I proposed. Think of the magnets as=20=
tiny=20
batteries in series and the field as electrical current in a poorly conducti=
ng=20
fluid. 
 
    Regards,
 
    Chris