A 100-W, 120-V lightbulb has a resistance of when cold (20C) and when on (hot)
Chapter 18, Problem 18.80(choose chapter or problem)
A 100-W, 120-V lightbulb has a resistance of when cold (20C) and when on (hot). Calculate its power consumption (a) at the instant it is turned on, and (b) after a few moments when it is hot.
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