On Fri, 7 Oct 2005 10:46:23 UTC, "Fred" wrote:

The temperature coefficient of the resistance of copper is 0.4%/deg C.
Therefore for a 30 degree increase the resistance will go up by 12%. So
instead of 90% of current flowing through the short leg in the example I
gave, it would be just under 89%.

(a) I did know that - it was tongue in cheek! (b) I was thinking of a
glowing cable!

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