Answered: If the 0.100-mm diameter tungsten…

If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of 0.200Ω at 20.0ºC, how long should it be?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter29: Direct Current (dc) Circuits

Section: Chapter Questions

Problem 19PQ

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Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

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If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of 0.200Ω at 20.0ºC, how long should it be?

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