Asked by Nina
Common light bulbs have a mental filament made of tungsten and when a current passes through it, it radiates visible light, as well as heat. If initially the filament's resistance is 2.45 ohm (6%) at 20 degrees Celsius and the temperature coefficient of resistivity α is 0.004403/degrees Celsius, what is its resistance at 40 degrees Celsius? And at 60 degree Celsius? (include the uncertainty of the result)
As the filament's temperature increases, does its resistance stay the same, increase or decrease?
As the filament's temperature increases, does its resistance stay the same, increase or decrease?
Answers
Answered by
bobpursley
It increases with increasing temperature.
http://en.wikipedia.org/wiki/Resistivity
http://en.wikipedia.org/wiki/Resistivity
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.