The filament of a certain lamp has a resistance that increases linearly with temperature. When a constant
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The filament of a certain lamp has a resistance that increases linearly with temperature. When a constant voltage is switched on, the initial current decreases until the filament reaches its steady-state temperature. The temperature coefficient of resistivity of the filament is 4 × 10–3 K–1. The final current through the filament is one eighth the initial current. What is the change in temperature of the filament?
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