Re: [Phys-l] solenoidal and cylindrical EM sourced magnetic fields.

[Moses Fayngold <moshfarlan@yahoo.com>]

Bernard Cleyet wrote on Fri, June 10, 2011 12:38:45 PM

> My solid coil is many (to fill space) solenoids inside each other (co-axial)  
> does this make a difference? 


No, it does not. We can as well recall that a bar-magnet is a system of aligned 
electron spins, whose individual magnetic fields can be modeled by coaxial 
microscopic current loops. This does not change the asymptotic form of magnetic 
field far away from the magnet, we still have B ~ 1/r^3. 

Moses Fayngold,
NJIT