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Veritasium "How Electricity Actually Works"
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electrodacus:
hamster_nz

Your last repay is so ridiculously wrong that is not worth my time to replay.

Just test to move the energy with a DC-DC converter that is at least 80% efficient.
If you start as in my example with 3V by the time the charged capacitor drops to 2.121V you got out half the energy and even with a 80% efficient DC-DC converter you will have 2.25Ws * 0.8 = 1.8Ws so around 1.9V on the second capacitor.
cj:

--- Quote ---EEVblog wrote:
Dereks's video at 21:10 Re. Rick Hartley about fields is 100% correct for high speed PCB design. But that does NOT apply at DC, not at all, not even one tiny bit.

--- End quote ---

Try making a magnetic sensor using for instance a Hall-effect sensor on a PCB and run a PCB trace close to the sensor running a DC current. Without a proper DC return path the resulting magnetic field will affect the sensor.
So even at DC E and M fields may affect circuits and precaution have to be taken.

CJ
T3sl4co1l:

--- Quote from: electrodacus on May 03, 2022, 04:19:34 am ---Yes there is no oscillation.

--- End quote ---

Oooh, a new testable claim!

So you will have waveforms for us very shortly, no?  The circuit is quite simple; you can use whatever RLC network between the two bulk caps as you see fit.  It must be a linear circuit; it would seem unfair to the initial claim to allow such.  After all, the initial claim is just two capacitors jammed together somehow, can't get more linear than that.

So this should be trivial to set up and demonstrate.  You have the necessary equipment, no?

I asked for an experiment a few days ago, I assume you've just been busy and haven't gotten around to it.  Surely it will take hardly any setup to do.

Looking forward to your results!




--- Quote ---You can get super close to ideal if you use an efficient DC-DC converter to transfer the energy from the charged capacitor to the discharged capacitor.
--- End quote ---

Oh; tut tut tut -- it can of course be done with a converter, but a converter is a nonlinear element!  Indeed an ideal converter has a negative (and hyperbolic at that) resistance input characteristic (for nonzero power flow, fixed load resistance/power), a great many things are possible with that, which are not possible in a linear system.

I trust you didn't misspeak earlier, that you mean a nonlinear element is in fact necessary to perform this experiment, right?

Tim
electrodacus:

--- Quote from: T3sl4co1l on May 03, 2022, 01:32:25 pm ---
Oh; tut tut tut -- it can of course be done with a converter, but a converter is a nonlinear element!  Indeed an ideal converter has a negative (and hyperbolic at that) resistance input characteristic (for nonzero power flow, fixed load resistance/power), a great many things are possible with that, which are not possible in a linear system.

I trust you didn't misspeak earlier, that you mean a nonlinear element is in fact necessary to perform this experiment, right?

Tim

--- End quote ---

What do you mean by "it can of course be done with a DC-DC converter" ?
Do you agree that you can transfer much more of the energy from the charged capacitor to the discharged capacitor and thus final voltage is higher than half and very close to ideal (0.707 * Vi) ?

I will attempt to make an analogy so you can visualize what happens. As any analogy it will have some limitations.

Imagine two identical barrels one full with water and the other empty and you want to split the water between the two barrels.
You have two choices:
1) connect a permeable hose between the two barrels but the hose will leak exactly half of the water (resistor) , if superconductor then no leak.
2) connect a flexible/stretchy but also permeable hose (inductor) and a valve (transistor) that you input some small amount of energy to control (energy from the water not external).
If you leave the valve open (allowing water to flow) then there is no leakage for the volume of water that stretches the hose but when the house is stressed at max based on water pressure (voltage) it will work exactly like a resistor so half the water is lost trough leakage.
Then before the hose is fully stretchered out you close the valve and allow the water in the stretched pipe to be pushed in the empty barrel and that way less water is lost trough leakage (ending as heat).

With choice 2 the DC-DC converter you just use an intermediary storage to transfer the energy from one place to the other in a much more efficient way.
The DC-DC converter will get close enough to ideal / superconductor case where there is no resistance.
T3sl4co1l:
But that's an active circuit.  You didn't say anything about control before.  Did you forget to mention control before?  Then who's controlling the superconductor?

Tim
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