So I was reading an article about an incadescent bulb that has been lighting day and night-constantly for the past 110 years in california, Livermore. According to Physicists from the US Naval Academy it was due to, how the bulb was built.

Two fundamental bulb building techniques differentiates this bulb with its modern day filament counterparts. 1) Its filament is 8 times thicker than modern day incadescent bulbs' and 2) its filament is made of carbon - a semi conductor.
The thicker the filament the more difficult it will be to burn out - that one is obvious. The carbon filament is a semi conductor and allows electricity to flow easier at higher temperatures. Hence the bulb functions better at higher temperature whereas the electricity in modern day bulbs at high temperatures goes towards destroying the bulb. Now this is what I want to talk about! At high temperatures, semi conductors are better conductors! When electricity flows easier, we say there is less resistance. My knowledge of resistance is based on something I heard about superconductors. Apparently, there are random moving particles, like people on a busy street that impedes the flow of electricity. By increasing temperature, these particles move faster, electricity will be more difficult to flow. If temperature was reduced, the particles move slower or even come to a halt. It is now very easy for the electricity to flow.


So I wanted to test this theory, because I realized I can make a thermometer! -Resistor connected to an ohmmeter| ohms multiplied by some number and gets converted to temperature - brilliant . So I connected everything.

I dropped the resistor into a pot of water and placed the pot over a fire.


First try, resistor at room temperature :)
As I monitored the temperature, something weird happened. I was not expecting this but the resistance started to drop, instead of increasing with increasing temperature.


First try, resistor dipped IN boiling hot water :)
This totally surprised me! Because I was like what the heck is this? - is this negative resistance? -and that exist! and that's a cool thing which I explain in another article.
So impressed and confused, I did some research and what I found was something very interesting. Resistors are made of semi conductors!


Second try, resistor at ambient temperature :)
And semiconductors have a very weird property. Due to increase in temperature, they become more conductive!
- And thats when I was like oh snap! After four dips and the same behaviour, I felt that I learnt something today feeling! And here now is an application of this weirdness, that enabled an electrical device to outperform its future counterparts.


Second try, resistor dipped IN boiling hot water :)
Very interesting... At high temperatures, semi conductors are better conductors!



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