If the 0.12-mm-diameter tungsten filament in a light bulb is to have a resistance of 0.2 2 at 20°C,how long should it be?The resistivity of tungsten is at 20°C is 5.6 x 10-8 22.m.L=m

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the 0.12-mm-diameter tungsten filament in a light bulb is to have a resistance of 0.2 £ at 20°C, ow long should it be? he resistivity of tungsten is at 20°C is 5.6 x 10-8 .m. = m

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

If the 0.12-mm-diameter tungsten filament in a light bulb is to have a resistance of 0.2 2 at 20°C,
how long should it be?
The resistivity of tungsten is at 20°C is 5.6 x 10-8 22.m.
L=
m

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