Physics
Physics, 21.06.2019 15:30, Anshuman2002

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

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Physics, 06.10.2019 08:00, isabelibarra6370
A580-mm long tungsten wire, with a 0.046-mm-diameter circular cross section, is wrapped around in the shape of a coil and used as a filament in an incandescent light bulb. when the light bulb is connected to a battery, a current of 0.526 a is measured through the filament. (note: tungsten has a resistivity of 4.9 × 10-8 ? • m.) how many electrons pass through this filament in 5 seconds? what is the resistance of this filament? what is the voltage of the battery that would produce this current in the filament?
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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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Physics, 25.10.2019 22:43, needthehelp78
Temperature sensing in a light bulb. incandescent lightbulbs use a tungsten wire as the light-producing filament by heating it to a temperature at which it is bright enough to produce light. the temperature of the wire can be estimated directly from the power rating and the resistance of the wire when it is cold. given a 120 v, 100 w lightbulb with a resistance of 22 w at room temperature (20c): a. calculate the temperature of the filament when the lightbulb is lit. b. what are the possible sources of error in this type of indirect sensing? explain.
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