8. A light bulb, having a tungsten-filament, draws 2.85 A at 220 V when running at normal condition. The cold resistance of the filament is 18 N at 25 °C. The temperature coefficient of resistance is 0.00355 ºC at 17 °C. Determine the temperature rise of the bulb when running at normal condition.

8. A light bulb, having a tungsten-filament, draws 2.85 A at 220 V when running at normal condition. The cold resistance of the filament is 18 N at 25 °C. The temperature coefficient of resistance is 0.00355 ºC at 17 °C. Determine the temperature rise of the bulb when running at normal condition.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter7: Luminaires, Ballasts, And Lamps

Section: Chapter Questions

Problem 15R: A good rule-of-thumb to estimate the expected life of a motor, a ballast, or other electrical...

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