Michel Jullian wrote:
>
>
http://en.wikipedia.org/wiki/Electric_current#The_drift_speed_of_electric_charges
>
> Almost unbelievable that such a low velocity leads to such a large relativistic
> effect, but I guess we can trust Einstein's maths.
>
If you read between the lines Michel, I think you will find that
the electron itself is the relativistic current loop with it's
intrinsic charge "circling" at c.
I = q* c/hbar = 19.8 amperes. 
 
If you go a step further you will start believing that the 1/R^2
gravity force is a time-dilated charge property  (magneto-gravity)
of these current loops that are the very essence of matter.  :-)
 
Fred

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