Bulb Flashlight

What is the temperature of a filament bulb when powered flashlight?

A common light bulb is estimated at 0.2 and 2.9 V. If the resistance tungsten light bulb filament at room temperature (20 ° C) is 1.10Ω, the estimated temperature of the tungsten filament when the bulb is lit.

I would try this. Calculate the nominal resistance using E = IR (to solve R). Assume that the increased resistance of tungsten is linear (in the range interest). Form a ratio of resistance at room temperature / ambient temperature in degrees Kelvin (absolute temperature use) = score resistance / temperature unknown x. Convert x degrees C. Good luck.

Bulb Flashlight

Bulb Flashlight