Re: Tesla Coil RF Transmitter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: stork <stork@xxxxxxxxxxxxxxxxxxx>

Does the current in the earth from the ground connection move as a 
conduction current also?  Does one half cycle later current move back 
from the earth as a conduction current into the ground connection?

My question:  Is current in the earth to and fro from the ground 
connection conduction or displacement current?  Is the earth itself a 
conductor or dielectric?


Tesla list wrote:
> Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
> Tesla list wrote:
>
> > Original poster: stork <stork@xxxxxxxxxxxxxxxxxxx>
> > Antonio,
> > What is the path of this current going into the ground, moving just 
> > a bit away from the ground connection and then returning to the terminal?
>
> It moves from the ground connection in all directions, until the local
> electric field is counterbalanced by the electric field attracting the
> current back to the top terminal. The current then stops, leaving the
> charges in the ground surface distributed as in a charged capacitor,
> where one of the plates is the top terminal (with some influence of the
> coil too) and the other plate is the ground.
> Some current moves away, as a ground wave following an electromagnetic
> wave in the air above, but it is very small for conventional Tesla
> coils, with dimensions much smaller than the wavelength of the operating
> frequency.
> Antonio Carlos M. de Queiroz
>
>
> .