A 100-W lightbulb has a resistance of about 12 ? when cold
Chapter 16, Problem 19P(choose chapter or problem)
Problem 19P
A 100-W lightbulb has a resistance of about 12 Ω when cold (20°C) and 140 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α = 0.0060 (C°)−1.
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