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| "Veritasium" (YT) - "The Big Misconception About Electricity" ? |
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| electrodacus:
--- Quote from: aetherist on April 30, 2022, 11:55:25 pm ---Veritasium's scope screen looks sick. --- End quote --- That screen shows how much energy left the battery and how much energy arrived at the load (resistor). Since current in that loop will be the same in battery and in resistor is clear to see that much more energy is delivered by the battery than dissipated on the resistor. Where is that extra energy that battery delivered ? Part of it is stored in the transmission line capacitance and inductance and part of it is lost as heat. As stored energy is irrelevant as it did no work the lost energy will be in the form of heat. All you need is a thermal camera and you can see that wires (copper pipe in this case) is what delivered the energy from battery to load. That initial small current seen trough the load is due to energy being stored in the transmission line. Not understanding what energy and energy storage is made Derek to come to a wrong conclusion about how energy is delivered from battery to load. |
| bsfeechannel:
--- Quote from: Naej on May 01, 2022, 12:44:03 am ---He used your confirmation bias against you, he only repeated his funny claim that "the energy is in the fields," giving no proof of the definition he chose (obviously). He added an argument from authority from Rick Hartley, who himself only used another argument from authority to claim the same thing. (It's bogus all the way down for some reason) He also made mistakes: - "electrons don't go to the battery" except they do it pretty quickly since they move at 1000km/s - "charges contract radially on a wire" except you'd have a charged core of the wire, and you don't (at DC) - he confused the 14 mW given by the capacitive coupling with the ~ mW given by the antennas (and I think this is a generous value). --- End quote --- All of this is irrelevant. He did the experiment and energy reached the load before it could travel the distance along the wires. End of story Wires are not pipes. |
| electrodacus:
--- Quote from: bsfeechannel on May 01, 2022, 02:34:26 am --- All of this is irrelevant. He did the experiment and energy reached the load before it could travel the distance along the wires. End of story Wires are not pipes. --- End quote --- 25x less energy compared to the point in time where electron wave reached the load traveling trough the wire. There is a fairly sharp transition between the two. |
| Sredni:
--- Quote from: aetherist on April 30, 2022, 11:55:25 pm ---Veritasium's scope screen looks sick. The green trace shows that there is a weak plus & minus 0.5V by 9.5 ns signal in his "battery" before he closes the switch (ie before his scope sends the "pulse")(or sends a signal or whatever). The yellow trace shows that there is a similar plus & minus 1.1V by 9.5 ns signal in his "bulb". ... What is causing these spurious initial signals? --- End quote --- 1/9.5ns = 105 MHz. Could it be an FM radio? https://radio-locator.com/cgi-bin/locate?select=city&city=Pasadena&state=CA KKGO and KPWR? |
| Sredni:
--- Quote from: electrodacus on May 01, 2022, 01:38:57 am ---That screen shows how much energy left the battery and how much energy arrived at the load (resistor). Since current in that loop will be the same in battery and in resistor --- End quote --- You think that KCL holds, in the first few nanoseconds? Oh dear, not another Kirchhoff battle... |
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