General > General Technical Chat
"Veritasium" (YT) - "The Big Misconception About Electricity" ?
EEVblog:
Because it's likely she isn't going to join in the discussion here, i'll post her response to my question:
Bud:
Her response does not make sense in its battery near bulb part. The circuit needs to be closed in order for the current to flow and produce the fields. You do not have to believe me, just put your current clump over a disconnected battery terminal and see what it will show you.
EEVblog:
--- Quote from: Bud on January 01, 2022, 01:11:52 am ---Her response does not make sense in its battery near bulb part. The circuit needs to be closed in order for the current to flow and produce the fields. You do not have to believe me, just put your current clump over a disconnected battery terminal and see what it will show you.
--- End quote ---
Let's make this easy and only talk about the DC steady state.
Does the energy flow in the field around the wire, or inside the wire?
If you use classical field theory, it's in the field and the Poynting vectors.
If you use quantum field theory is seems like the probability is that it's almost entirely within the actual copper wire, which to me makes more sense.
bdunham7:
--- Quote from: EEVblog on December 31, 2021, 11:39:44 pm ---Nice explanation, sounds pretty solid to me. Quantum probability theory trumping Poynting?
--- End quote ---
It was rather offhand and not really rigorous and didn't really address the actual question (1m/c or 1 second). The presentation started to discuss the nature of fields, but then seemed more to only address the earlier part of Derek's video. Perhaps that was the intent.
Bud:
@EEVBlog : Not sure if i understood you correctly but a battery with a closed loop *does* represent a steady state, disregarding the moment when the switch gets closed.
So yes, finally after 30 pages of nonsense with transmission lines which only applied to that switch state transition time, lets now talk how energy is transferred in the steady state, i am all ears :D
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