Nanoseconds per foot (RE: RIP: Betty Holberton)

From: Greg Ewing <>
Date: Wed Dec 12 17:12:25 2001

Boatman on the River of Suck <>:

> I was always of the impression that the electrons themselves move slower,
> but the propogation of waves in the magnetic field of a stream of moving
> electrons was 2/3 the speed of light (roughly)?

It depends on the geometry of the conductors involved;
the more inductance and capacitance, the slower the
signal travels. I seem to remember hearing a figure
of about 1/3 c for typical coax or twisted pair

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury, | A citizen of NewZealandCorp, a |
Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | +--------------------------------------+
Received on Wed Dec 12 2001 - 17:12:25 GMT

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