Chapter 20: Problem 5: Consider that a 0.105 mm diameter tungsten filament in a light bulb needs to have a resistance of 0.225 Ω at 20.0°C. a) How long should the filament be in m, assuming the resistivity of tungsten is 5.60 × 10^-8 Ω⋅m?

Chapter 20: Problem 5: Consider that a 0.105 mm diameter tungsten filament in a light bulb needs to have a resistance of 0.225 Ω at 20.0°C. a) How long should the filament be in m, assuming the resistivity of tungsten is 5.60 × 10^-8 Ω⋅m?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 12CQ: Explain why R=R0(1 + a?T) for the temperature variation of the resistance R of an object is not as...

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Question

Chapter 20: Problem 5: Consider that a 0.105 mm diameter tungsten filament in a light bulb needs to have a resistance of 0.225 Ω at 20.0°C.

a) How long should the filament be in m, assuming the resistivity of tungsten is 5.60 × 10^-8 Ω⋅m?

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