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"Veritasium" (YT) - "The Big Misconception About Electricity" ?

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SiliconWizard:
So now, let's study the same setup, but with a circular wire loop instead of a rectangular one. :)

SandyCox:

--- 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. :)

--- End quote ---
I assume we are talking about two circular loops, replacing the two rectangular loops?

The answer will essentially be the same. During the transient energy, in the form of an electromagnetic wave, will reach the bulb after approximately 1m/c seconds.

The situation in the steady state is very different: All the energy is transfered by means of the flow of charge. The magnetic and electric fields (and the Poynting vector) makes it possible for us to measure that energy is flowing. However energy is not transferred through the electric and amgnetic fields.

I am working on a more detailed explanation.

HendriXML:

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.

rfeecs:

--- 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.

--- End quote ---

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.

HendriXML:

--- 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.

--- End quote ---

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.

--- End quote ---
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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