Ds..... Wasn't it Hans who said I need more lessons in ohms law....Ha Ha Ha....
Hi Mr. Perfect,
some day I'll certainly find a typo in one of your posts.
Here is the headline of the thread:
Making a glow plug? or hot metal wire..
Of course, copper is a metal, as well as nichrome or constantan are.
You stated that copper wire might have a resistance of 0.2 Ohm/ft and at the same time "promoted" it for zero Ohm resistance. That way you saved a lot of work for scientists searching for the perfect conductor.
A little refreshment on the specific resistance of copper will reveal a value of 0.01786 Ohm at 1 square mm cross section and 1m of length.
Since the melting temperature of copper is relatively low (1,357K/1,084C) it would be almost the worst choice to use it for heating purposes.
Wolfram has a higher specific resistance than copper and its melting temperature is 3,695K/3,422C)
BTW, calling me by my first name is reserved for friends only!
Boncuk