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"Veritasium" (YT) - "The Big Misconception About Electricity" ?
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SandyCox:
https://www.scienceforums.net/topic/20442-what-makes-a-crackpot/
penfold:

--- Quote from: aetherist on February 14, 2022, 01:46:10 am ---[...]
I don’t think that i have ever seen a calculation for the faux-speed of (old) electricity, but it would come out to about c/100,000,000.
The delay for a marble popping out would be at least as long as the delay of a sound wave in a glass marble.
[...]

--- End quote ---

How do you define the faux-speed? The change in charge distribution and current due to an electric field resulting from an injection of current or change in E-field or B-field is predicted rather well by Maxwell. Maxwell doesn't determine the electron velocities directly, only a J 'field', but it would be a pretty trivial step to determine how much charge is displaced and at what rate to satisfy the external E and B fields.

A thick enamel coating would affect the relationship between the external fields and internal charge density that would ultimately affect the speed of propagation. That is something that is probably most well studied in antenna theory, or at least if there were any surprising results, they'd have probably shown up in that field already... worth investigating maybe.
eugene:
https://www.researchgate.net/publication/12688660_Unskilled_and_Unaware_of_It_How_Difficulties_in_Recognizing_One's_Own_Incompetence_Lead_to_Inflated_Self-Assessments
SandyCox:

--- Quote from: penfold on February 14, 2022, 12:53:35 pm ---A thick enamel coating would affect the relationship between the external fields and internal charge density that would ultimately affect the speed of propagation. That is something that is probably most well studied in antenna theory, or at least if there were any surprising results, they'd have probably shown up in that field already... worth investigating maybe.

--- End quote ---

The topic is not new. Here is an example of a paper:
https://ieeexplore.ieee.org/document/1131547
penfold:

--- Quote from: SandyCox on February 14, 2022, 06:27:25 pm ---
--- Quote from: penfold on February 14, 2022, 12:53:35 pm ---A thick enamel coating would affect the relationship between the external fields and internal charge density that would ultimately affect the speed of propagation. That is something that is probably most well studied in antenna theory, or at least if there were any surprising results, they'd have probably shown up in that field already... worth investigating maybe.

--- End quote ---

The topic is not new. Here is an example of a paper:
https://ieeexplore.ieee.org/document/1131547

--- End quote ---

And... hey presto... it is and it has been well studied in antennas... won't be purchasing the article, but I guess it's a safe assumption that from an input impedance and fields perspective it shows a good agreement with Maxwell?
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