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| Veritasium "How Electricity Actually Works" |
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| snarkysparky:
Does electricity flow in air or wires? The correct answer is BOTH.. In the video a transient energy lights the bulb quickly because of fields. But the wires take over, otherwise there could be no light output from a DC source. It seems this whole confusion is cause by the attempt to make it one or the other. |
| SandyCox:
I agree. |
| PlainName:
--- Quote from: snarkysparky ---In the video a transient energy lights the bulb quickly because of fields. But the wires take over, otherwise there could be no light output from a DC source. It seems this whole confusion is cause by the attempt to make it one or the other. --- End quote --- I think that's missing an important thing. No doubt we are all mostly agreed that there is some fields stuff going on before the wires are connected, but what it's really about is after that, when there is a solid wired connection. Does the energy flow in the wire, on the wire (skin) or is the wire merely a guide and the energy actually flows still in the field? As I see it, and it's sometimes tricky to remember what the argument is about, it's that last option which is the crux of the video and this discussion. |
| EEVblog:
--- Quote from: snarkysparky on May 11, 2022, 09:55:35 am ---Does electricity flow in air or wires? The correct answer is BOTH.. In the video a transient energy lights the bulb quickly because of fields. But the wires take over, otherwise there could be no light output from a DC source. It seems this whole confusion is cause by the attempt to make it one or the other. --- End quote --- The math works out for both DC and AC, and the claim is the same, the energy flow is outside/on the surface of the wire, even at DC. The entiriety of classical electrodynamics physics in built upon this. |
| EEVblog:
--- Quote from: dunkemhigh on May 11, 2022, 10:40:49 am ---I think that's missing an important thing. No doubt we are all mostly agreed that there is some fields stuff going on before the wires are connected, but what it's really about is after that, when there is a solid wired connection. Does the energy flow in the wire, on the wire (skin) or is the wire merely a guide and the energy actually flows still in the field? As I see it, and it's sometimes tricky to remember what the argument is about, it's that last option which is the crux of the video and this discussion. --- End quote --- For me the question is entirely about DC and energy inside vs outside the wire. Nothing to do with switches, transmission lines, capacitors, inductors, transformer theory, antenna theory etc etc. |
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