2. An incandescent light bulb uses a cold filament of tungsten that is 580 mm. long with a diameter of 46 um and has a resistivity of 5.25 x 10-8 Q-m at 20°C. If the initial resistance of tungsten is 100 at 20°C and a temperature coefficient of resistance of 0.0045 °C. What is the temperature of the filament?

2. An incandescent light bulb uses a cold filament of tungsten that is 580 mm. long with a diameter of 46 um and has a resistivity of 5.25 x 10-8 Q-m at 20°C. If the initial resistance of tungsten is 100 at 20°C and a temperature coefficient of resistance of 0.0045 °C. What is the temperature of the filament?

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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