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| Veritasium "How Electricity Actually Works" |
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| bsfeechannel:
--- Quote from: Naej on May 23, 2022, 10:00:16 am ---Yes science looks like magic to people without knowledge. It's ok. You can learn if you want to, but you have to stop mocking it first. --- End quote --- You are the antimatter version of the Aetherist. He thinks that without an ether locality is violated. You, on the other hand, think that space is empty and needs some kind of material support for locality to exist. If you some day meet him, you'll annihilate each other and release at least two very energetic and momentous photons. |
| electrodacus:
--- Quote from: HuronKing on May 23, 2022, 08:02:07 am ---J.D. Kraus, Electromagnetics Chapter 10, P.418 http://xn--webducation-dbb.com/wp-content/uploads/2019/09/McGraw-Hill-electrical-and-electronic-engineering-series-John-D.-Kraus-Keith-R.-Carver-Electromagnetics-McGraw-Hill-1981.pdf Let me guess? You're gonna start railing about how Kraus, THE Kraus, 'doesn't understand capacitors and energy storage'? :-DD :-DD :-DD You really ought to familiarize yourself with the textbooks Derek is using as his source material. Kraus' diagram of the Poynting energy flow on P.417 is very standard in advanced electromagnetics. https://en.wikipedia.org/wiki/John_D._Kraus --- End quote --- The guys that lived way before electron was discovered (John Henry Poynting 1884) could only guess what happens and it guessed wrong. Derk has significant lack in understanding energy and energy storage as it clearly showed in the video about faster than wind direct downwind vehicle and now here with the transmission line. Derek only so called "proof" was to show that some current flows through the load before it had time to travel around the wire. But that is no proof if you understand that two parallel wires have capacitance and understand that capacitor is a energy storage device. Electrical current in modern times (after the electron was discovered so after both Poynting and Maxwell where alive) is the flow of a charged particle (electron in this particular case but can also be ions). As there is no electron flow outside the wires in this example at 20V and 1m of air between wires all energy both at constant DC but also during transient is transported through wires only. |
| electrodacus:
For all those that think that energy is traveling outside wires I have a question. Can you shield against electric and magnetic fields ? If yes then can I shield the battery or the load so that energy can no longer get to load ? |
| SiliconWizard:
It's been two threads and things are still running in circles. While I do not agree with everything electrodacus has written, I understand his question here: I don't think I've really seen a proper answer (except possibly in the early stages of the first thread), neither on here or in Veritasium's videos, about the role of wires and why we actually needed them (but we do for sure.) |
| xrunner:
--- Quote from: SiliconWizard on May 23, 2022, 05:13:13 pm ---It's been two threads and things are still running in circles. While I do not agree with everything electrodacus has written, I understand his question here: I don't think I've really seen a proper answer (except possibly in the early stages of the first thread), neither on here or in Veritasium's videos, about the role of wires and why we actually needed them (but we do for sure.) --- End quote --- Is all this about why we need wires to transmit energy? I haven't followed along enough to know what the hell is going on, so I probably should keep my mouth shut. :-DD But no, we don't need wires to get energy from point A to point B. You can do it wirelessly. Say you have an electric lawn mower: you need electric energy to power it. You can get it from a battery on-board (short wires). Or you can use long wires and use an extension cord back to the mains outlet. Or ... You (in theory) could use a high powered rf beam of a certain frequency to get the energy to the mower. You'd either have to blanket the yard with rf, (very inefficient) or have a tracking system so both antennas have the maximum gain aligned all the time you are mowing. Then an on-board power supply system to turn the rf into DC. We're forgetting about what the high power rf beam will do to your body at the moment. ??? Yea it's possible but go ahead and try to build the wireless lawn mower power system and see how long it is before you go back to good old wires ... :palm: |
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