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Re: Filament resistance



At 13:46 4/2/98 -0700, you wrote:

From Cutnell & Johnson PHYSICS 4th Ed. NY: Wiley p.618

Q20.12: The filament in an incandescent light bulb is made from tungsten.
The
radius of the tungsten wire is 0.045 mm...

Soln manual suggests a 150W bulb has a 11m long filament. If the above
radius
is correct, I concur.

/rho_{tungsten} = 5.6 x 10^{-8} ohm * m
....
Dan MacIsaac

I very much doubt this is the case.
Would Dan care to justify his position?

Whatcott Altus OK