Physics, 10.10.2019 00:00 deena7

The filament of an incandescent light bulb is made of tungsten which has a thermal coefficient of resistivity of α = 4.4 x 10-3 k-1. the filament is initially at room temperature, to = 293 k. when it is connected across a v = 140 volt power supply the filament quickly heats up to t = 2900 k at which time the current flowing through the filament is i = 0.95 amps.

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The filament of an incandescent light bulb is made of tungsten which has a thermal coefficient of re...