[SI-LIST] Re: Partial Inductance/Vector Potential
- From: "George Tang" <gtang@xxxxxxxx>
- To: <syedmhusain@xxxxxxxxxxx>, <juergen.rauscher@xxxxxx>,<si-list@xxxxxxxxxxxxx>
- Date: Thu, 29 Jan 2004 18:21:20 -0800
When you take the integral of the magnetic field intensity of a closed loop
around a current carrying element, you get the current flowing in that
element. Since the current is finite (as most things are in the real
world), the value of the integral has to be finite. When you make the
integral loop infinite, the field intensity has to be zero. This is the
physical meaning.
For the algebraic justification: A finite number divided by infinity is
equal to........ Uh............... Zero??
George
----- Original Message -----
From: "Juergen Rauscher" <juergen.rauscher@xxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Wednesday, January 28, 2004 1:21 AM
Subject: [SI-LIST] Partial Inductance/Vector Potential
> Hi all,
>
> Ruehli relates a partial inductance to the magnetic flux which extends
> from a conductor filament to somewhere near infinity. This magnetic flux
> is limited by boundaries starting at the end points of the conductor
> filament to infinity. The magnetic flux can now be calculated with a
> contour integral around the loop. Therefore the vector potential at
> infinity is set to zero. What is the physical meaning or algebraic
> justification for setting the vector potential to zero?
>
> Any hint is appreciated.
>
> Regards,
> Juergen
>
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