General > General Technical Chat
Veritasium "How Electricity Actually Works"
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SiliconWizard:
Yes. A piece of wire has inductance. And conductive hollow cylinders (tubes) are in fact legit transmission lines. AFAIK.
hamster_nz:

--- Quote from: Naej on May 13, 2022, 12:43:42 am ---
--- Quote from: hamster_nz on May 12, 2022, 08:09:21 am ---
--- Quote from: electrodacus on May 12, 2022, 05:27:08 am ---Why will I be bothered by that ?

--- End quote ---

And it doesn't bother you at all that there is no circuit you can put in region A in the diagram below that can extract energy from the wires that surround it? Even a DC/DC convertor? Even if you can connect it to a GND? But extracting energy from regions B or C is a piece of cake?

--- End quote ---
And it doesn't bother you at all that energy is supposedly flowing through the region A yet there is no circuit you can put in region A in the diagram that can extract energy from it?
(Hopefully the answer is no)

--- End quote ---
No, with no voltage potential over region A, there is no way you can extract energy from the field in just that region.

--- Quote from: Naej on May 13, 2022, 12:43:42 am ---
--- Quote from: hamster_nz on May 12, 2022, 08:09:21 am ---And it doesn't bother you that for your version of electrostatics  (sum of force between charges), every charge needs to be in consistent communication with every other charge in the universe, to work out how far away they are, and at what direction?

--- End quote ---
Are you bothered???
Do you think that if every electron could communicate with far away electrons, humans could make machines hacking this property to communicate messages?

--- End quote ---
It did bother me just a little - Every charge being constantly aware of every other charge in the universe does not have the feel of being fundamental to the universe.

An electric field can still be used to communicate messages. "Ripples in the fields" is preferable to "very small pushes and shoves over great distances".


--- Quote from: Naej on May 13, 2022, 12:43:42 am ---
--- Quote from: hamster_nz on May 12, 2022, 08:09:21 am ---And it doesn't bother you that a transmission line is a series of inductors and capacitors, however on inspection those capacitors and inductors can neither be identified or isolated?

--- End quote ---
A wire is an inductor. With 2 you have an inductor and half a capacitor. And it works even for infinitesimal wires.  8)

--- End quote ---
Fair call. But I still feel that a lumped model of a continuous thing is (very useful) approximation.
hamster_nz:

--- Quote from: electrodacus on May 13, 2022, 12:36:46 am ---
--- Quote from: hamster_nz on May 12, 2022, 11:42:04 pm ---What you are saying is "If I had a Unicorn, then I could open a Unicorn Zoo - prove me wrong!".

No, you prove me wrong. Show me your unicorn!

--- End quote ---

You will think that it is a unicorn because you do not understand the subject. It is in fact just a simple horse :)

But here is the proof
(Attachment Link)

--- End quote ---
You are a hard person to goad something out of, but eventually it works. :)
electrodacus:

--- Quote from: hamster_nz on May 13, 2022, 02:23:00 am ---You are a hard person to goad something out of, but eventually it works. :)

--- End quote ---

Is that your replay ? How about you understand now that if you transfer energy more efficiently from one capacitor to the other that is identical you get close to 0.707 the voltage of the charged capacitor in both.
It should not be me that is doing the work.
bsfeechannel:

--- Quote from: Naej on May 13, 2022, 12:21:39 am ---Really, where then?

--- End quote ---

Now you're trolling.


--- Quote ---You gave no example of an alternative breaking any of this ;D . Coincidence?
--- End quote ---

If you couldn't recognize it, this means you didn't go very far in your understanding of the problem.


--- Quote ---Sure so in the 20th century and 21st physicists never heard of antennae.  ::)

--- End quote ---

Who knows? What is important to understand is that the alternatives never prospered.
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