General > General Technical Chat
Electroboom: How Right IS Veritasium?! Don't Electrons Push Each Other??
<< < (43/148) > >>
PlainName:

--- Quote from: electrodacus on July 03, 2022, 06:14:05 pm ---
--- Quote from: dunkemhigh on July 03, 2022, 05:30:57 pm ---I am avidly awaiting your announcement of how some energy storage thing (aside from the obvious batteries) works in the circuits you're now ignoring.

--- End quote ---

Is a capacitor an energy storage device or not ?  A battery converts chemical reaction in to electricity and some batteries are rechargeable meaning you can reverse the chemical reaction by supplying energy to the battery.


There is a good reason I insist in using a charged capacitor as the energy source in the circuit as understanding the capacitor is vital in understanding how electricity works.

Two neutrally charged parallel metal plates (say copper) with same number of free electrons as the number of atoms will represent a discharged capacitor.
There will be no electric field between the two plates.

Take a wire and connect those two plates together. Nothing will charge as the wire also say made of copper is also neutral has as many free electrons as the two capacitor plates.
 
Then get a permanent magnet and move it next to the wire. This will make the electrons move in one direction so one of the plates will have a deficit of electrons while the other plate an excess and since electrons have moved you will feel that force opposing the magnet while you are moving it so you spend some energy.
Part of this energy you introduced in the circuit will end up as heat (electromagnetic radiation) due to wire having resistance and some will be stored in the capacitor.
But as soon as you stopped moving the magnet the stored energy will be released as electrons now move in the opposite direction through the wire part of that energy ending up as heat and part reverse charging the capacitor but less energy as some was radiated as heat due to resistance. There may be a few cycles back and forth until all energy will be radiated as heat (electromagnetic radiation in the infrared spectrum so broad spectrum around a few THz).

If you move the magnet as before you stop disconnect the wire then the capacitor will remain charged and now you will have excess electrons on one plate and deficit of electrons on the opposite plate.
This excess electrons will really like to get on the other side to be united with their atoms thus this electric field that tries to pull the plates closer together.
The capacitor will stay charged so you have stored electrical energy and in order to use that energy you need a wire connecting the two plates.

Say you have the charged capacitor now and you connect a high resistance wire so that it takes say one hour for all electrons to move from one plate to the other.
If I add another similar wire just next to this one it takes just half the time so half an hour. Why will that be if electric field is the same ?

--- End quote ---

Wow  :wtf:

I am agog to know how all this stuff about capacitors and magical storage devices relates to the circuits posted earlier. For reference, they are attached.

Remember that the question posed was: what's the difference with the top wire, where in the circuit that burns 1W it is passing 1A, and in the circuit burning 2W it is passing, ah, 1A. Voltage is the same in both cases. But, clearly, you think 'energy storage' is the answer to everything!
PlainName:

--- Quote ---The equation shows that ...
--- End quote ---

Has it never occurred to you that you might be either using the wrong equation, or the right one in the wrong situation?
electrodacus:

--- Quote from: dunkemhigh on July 03, 2022, 08:55:17 pm ---Wow  :wtf:

I am agog to know how all this stuff about capacitors and magical storage devices relates to the circuits posted earlier. For reference, they are attached.

Remember that the question posed was: what's the difference with the top wire, where in the circuit that burns 1W it is passing 1A, and in the circuit burning 2W it is passing, ah, 1A. Voltage is the same in both cases. But, clearly, you think 'energy storage' is the answer to everything!

--- End quote ---

You can replace the battery with a charged capacitor. Capacitors are not magic.
Understanding energy and energy storage will be the answer to many things you consider magic now.

How is the voltage the same in both cases ?
You have 1A and 1V in the left side (duplicated) and you have 1A and 2V on the right side.
electrodacus:

--- Quote from: dunkemhigh on July 03, 2022, 08:57:16 pm ---
--- Quote ---The equation shows that ...
--- End quote ---

Has it never occurred to you that you might be either using the wrong equation, or the right one in the wrong situation?

--- End quote ---

It is the correct equation for that situation.  The situation is a wind only powered vehicle driving directly downwind.
Of course the equation is for idea case where there is no friction.
So that is the absolute best case for the amount of wind power available to a direct downwind vehicle.
The equation is valid at any vehicle speed so the same equation is valid below, at and above wind speed.
gnuarm:

--- Quote from: electrodacus on July 03, 2022, 09:12:08 pm ---
--- Quote from: dunkemhigh on July 03, 2022, 08:57:16 pm ---
--- Quote ---The equation shows that ...
--- End quote ---

Has it never occurred to you that you might be either using the wrong equation, or the right one in the wrong situation?

--- End quote ---

It is the correct equation for that situation.  ...

--- End quote ---

Just when you thought it was safe!
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod