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