[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TCML] Re: Spark models, revisited
Em 18/10/2012, às 11:43, "Udo Lenz" <udo_lenz@xxxxxxxxxxxxxx> escreveu:
>
> That poses another question. A thin conductor does not have much
> capacitance. The model calculations for a real arc indicate about
> 10 to 20 pF/m.
> That is much more than a 0.2mm wire would have. Possibly a thin
> conductor like that would be a perfect breakout point for sideways
> arcs or create corona around the main arc, adding capacitance.
>
Thin conductors have really this range of capacitance. The inductance of a thin wire is approximately 1 uH/m. Adding distributed capacitance, a transmission line is formed. With L being the inductance per meter and C the capacitance per meter, the speed of a signal
travelling through the line is 1/sqrt(LC). As this speed must be smaller than the speed of
light c, c^2<1/(LC), C<1/(Lc^2) = 1/(1e-6 x 9e16) =11.1 pF/m.
Antonio Carlos M. de Queiroz
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla