(II) A 100-W lightbulb has a resistance of about 12.? when
Chapter 18, Problem 23P(choose chapter or problem)
Problem 23P
(II) A 100-W lightbulb has a resistance of about 12.? when cold (20°C) and 140 ? when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α =0.0045 (C°)-1
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