In sci.physics, w_tom

wrote
on Sat, 10 Jul 2004 02:06:11 -0400
:
Put an impulse down a wire. Where on that wire will the
impulse voltage first be seen? On the near end where the
impulse starts? Obviously not. Impulse first appears at the
far end of wire. How can this be when it takes the impulse 1
foot per second to get to that far end?

Erm, 1 foot per *nano*second. Light speed.

Perhaps it's somewhat less than that; AIUI electric current
is along the lines of 2/3 c, but it's still pretty darned
fast.

[rest snipped]

--
#191,
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