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"Veritasium" (YT) - "The Big Misconception About Electricity" ?
SiliconWizard:
--- Quote from: HendriXML on December 31, 2021, 07:10:53 pm ---
--- Quote from: rfeecs on December 31, 2021, 05:55:13 pm ---
--- Quote from: HendriXML on December 31, 2021, 04:18:02 pm ---The first half with formula's I skipped, but the 2nd half shows to me a valid point about electric fields in wires vs air gap when using quatum theory.
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I am guessing that she is just explaining the inverse square drop off of the Coulomb force by using quantum field theory, saying it is much stronger between electrons in the wire than electrons separated by one meter.
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Which would mean that most of the energy is transported through the wire, just as most people would have expected. The video of Veritasium was quite different and seems a misrepresentation of the theory (in comparison).
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Well, maybe we should start by defining in a strict manner what "transported through the wire" means. I'm sorry, but "through the wire" is not really a scientific concept. That needs to be a little bit more defined that this.
Then looking at various videos and various posts in this thread, it doesn't even look like everyone means the same with that phrase, which is not surprising.
SiliconWizard:
--- Quote from: SandyCox on December 31, 2021, 04:00:52 pm ---
--- Quote from: SiliconWizard on December 30, 2021, 06:33:58 pm ---So now, let's study the same setup, but with a circular wire loop instead of a rectangular one. :)
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I assume we are talking about two circular loops, replacing the two rectangular loops?
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Uh. Sometimes, words are poor at expressing simple things. So, what I meant was essentially something like this: https://www.eevblog.com/forum/chat/veritasium-(yt)-the-big-misconception-about-electricity/msg3823973/#msg3823973
With the battery and switch (let's neglect the distance between those two again) diagonally opposite to the load, and R the radius of the circle.
HendriXML:
If one posts a video about "misconception about electricity", which shows large fields around the wire and is probably a huge misrepresentation of the underlying theory than things don't get better in the common understanding of things.
It seems like the probably vague conception (called misconception) most people had/have is closer to the truth/theory, which would make the video kinda pointless.
SiliconWizard:
--- Quote from: HendriXML on December 31, 2021, 07:52:51 pm ---If one posts a video about "misconception about electricity", which shows large fields around the wire and is probably a huge misrepresentation of the underlying theory than things don't get better in the common understanding of things.
It seems like the probably vague conception (called misconception) most people had/have is closer to the truth/theory, which would make the video kinda pointless.
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While it's lacking in various areas, the video is still interesting in that it's thought- (and discussion-) provoking. But again, claiming what is the "truth" or not is itself pointless unless getting in a lot of intricate details, which far exceeds what can be done in a single YT video.
One related "misconception" often noticed is the way electrons move in (or through) - again that's unfortunately a very vague concept when put like this - a conductor when current "flows". In particular, the idea that a given electron will move all the way along the conductor, as would molecules of water flowing through a pipe. But isn't that also the distinction between quantum particles and those that are not?
EEVblog:
--- Quote from: HendriXML on December 31, 2021, 04:18:02 pm ---
I got this one in my recommended list, which has only a few hundred views, so hence I link it here. The first half with formula's I skipped, but the 2nd half shows to me a valid point about electric fields in wires vs air gap when using quantum theory.
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Very interesting, thanks for posting.
Nice explanation, sounds pretty solid to me. Quantum probability theory trumping Poynting?
I've sent this to Derek.
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