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Post by michaelmorin on Jan 24, 2018 9:46:23 GMT
Hello, Firstly, resistance is kind of like the measure of obstruction in a conducting material; right? So maybe the atomic properties of the conducting material are such that the current of electrons gets obstructed and ends up colliding with stuff in the way and as a result it generates all sorts of forms of energy. Is that right? I tried searching for it but I didn't have any luck. I found an article on joule heating which talks about the amount of heat generated by a certain current going through a conductor with a certain resistivity (P = RI2). I don't even know if what I understood from the article is correct. Anyway, if I double the external area of a piece of conducting wire. Will it be able to dissipate twice the amount of heat? Please help Thanks I didn't find the right solution from the Internet References: www.physicsforums.com/threads/general-questions-about-electromagnetismWhiteboard Explainer Video
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Post by Sevyrs on Jan 25, 2018 16:03:45 GMT
Hey! Thanks for the question!
As for your answer to be honest there are a myriad of factors that influences what you are asking about. Some of these would include:
*material *energy *heat/conduction rating *length/width of material *quality of material
These are some of the most basic and immediately affecting factors that influence this. Not many bother thinking about these things and it's unfortunate because it is a very interesting topic to consider. I realize that this basic response doesn't really explain what you want to know but what you're asking is a broad question with many factors capable of affecting the outcome.
To put a simple spin on it however, I would say that: yes, generally speaking, a specific conductor with an established resistance level being energized with a specific level of current will in fact generate a specific amount of heat under optimal conditions. If you were to say double the external space or rather than that to use a conductor that has twice the overall surface space but equivalent internal integrity and resistance and finally run the exact same level of current through it as before then the detectable heat emitted will be reduced by not half but more likely around 40%.
Now obviously this may seem strange since you now are essentially running half the current through the original conductor. The reason for this is that now you have the same current running through an area that not only has essentially 4 lanes instead of 2 lanes like on a highway but you also have more space for the current (cars) to move in but there are speed bumps all over the roads at random intervals that are at a predictable quantity. That said, this means that the current (cars) are able to hit more of the bumps rather than being limited to only the path they originally had and thus a marginal amount of excessive heat (created by the resistance) is generated. Think of it like this, the single file line of inmates at a prison now have the space to walk shoulder to shoulder and thus get in more people's way.
I hope this helps some. I tried to use simple metaphors on the off chance someone else looks at this because not everyone is familiar with applied electrical physics or even have a background with anything that relates to it. If you have other questions then please let me know. If you want more detailed info then I'm happy to oblige.
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