(II) A 100-W lightbulb has a resistance of about 12 Q whencold (20°C) and 140 N when on (hot). Estimate the tem-perature of the filament when hot assuming an averagetemperature coefficient of resistivity a = 0.0045 (C°)-1.

Given quantities: Resistance at 20 degree Celsius (R0) = 12 ohm final resistance (R) = 140 ohm…

Answered: (II) A 100-W lightbulb has a resistance…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

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Chapter10: Direct-current Circuits

Section: Chapter Questions

Problem 66P: A short circuit in a 120-V appliance cord has a0.500- resistance. Calculate the temperature rise of...

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(II) A 100-W lightbulb has a resistance of about 12 Q when cold (20°C) and 140 N when on (hot). Estimate the tem- perature of the filament when hot assuming an average temperature coefficient of resistivity a = 0.0045 (C°)-1.