A common flashlight bulb is rated at 0.40 A and 2.7 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 1.5 02, what is the temperature of the filament when the bulb is on? The temperature coefficient of resistivity is 6.1 × 10-³ K-¹ for the filament material.

A common flashlight bulb is rated at 0.40 A and 2.7 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 1.5 02, what is the temperature of the filament when the bulb is on? The temperature coefficient of resistivity is 6.1 × 10-³ K-¹ for the filament material.

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Current And Resistance

Section: Chapter Questions

Problem 27.81AP: The potential difference across the filament of a light-bulb is maintained at a constant value while...

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