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Veritasium "How Electricity Actually Works"
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PlainName:

--- Quote from: electrodacus on May 16, 2022, 10:37:17 pm ---
--- Quote from: dunkemhigh on May 16, 2022, 10:17:26 pm ---
Well, hang on a minute. There is 4mA going through that resistor, enough to light up an LED. Energy must be involved there, no? Where did that come from?

In that case the air on one side pushes against the membrane and that pushes against whatever is on the other side. You've transferred energy from the pushing side to the pushed side, haven't you?

--- End quote ---

Yes those 4mA are due to electrons leaving that plate of the capacitor (the discharged capacitor has equal amount of free electrons on each plate) so when you charge a capacitor you push electrons on to one plate while the same amount of electrons leave the other plate same as in that compressed air tube analogy air molecules enters one side and others are leaving from the other side.
--- End quote ---

OK, I guess we are on the same page, then. The energy going into the capacitor on the plus side is pushing energy out of the capacitor on the negative side, right? In a simplistic manner of speaking.

So, back to our capacitor with 1m of free air in the middle... there is a net energy transfer from one side to the other. The PSU is pushing some energy into the cap which is consequently pushing the same amount of energy out to the resistor which is consuming it (aka converting to heat/light). The PSU has lost it, the resistor has used it, yes?
SandyCox:
Please look at Equation 18. Zo is real. It is a resistance and has no imaginary part. Note that the two transmission lines and the resistor form a resistive divider. Let's assume that the line is perfectly matched, i.e. R = 2Zo. Before the first reflection arrives back, 3/4 of the energy delivered by the battery is sorted in the two transmission lines. 1/4 is dissipated in the resistor. No energy is transferred from the transmission line to the resistor.
electrodacus:
Not sure why I did not get notifications but likely google AI trying to protect me from wasting more time :)
In any case you all seems to completely ignore energy storage is like that does not even exist for you.
It all gets down to you thinking energy pases trough a capacitor that will mean current passing through a capacitor instead on in to a capacitor as that energy is stored energy doing no work.
The wires connecting the capacitor to the supply will have a loss and you can add resistor or lamps in series with those and have even more loss but all the energy that will flow is to charge the capacitor not going through capacitor.
That is why with DC current will only flow for a short time as much as it is needed to charge the capacitor. If there is any current after that it will be super small and is the leakage current for that capacitor that is the equivalent for a high value resistor in parallel with the capacitor and has nothing to do with the results measured by Derek as that leakage current is so small it will not register on a 8 or even 12bit oscilloscope.

The definition of an electrical current is "a stream of charged particles like electrons or ions moving through an electrical conductor".
There are no electrons let alone ions traveling through that 1m of air between the lines.
If there is no electrical current then there is no electrical power and thus no energy traveling outside the wire.
PlainName:

--- Quote from: electrodacus ---It all gets down to you thinking energy pases trough a capacitor...
--- End quote ---

So you're agreed that energy does indeed pass through a capacitor? That 1m gap without any wires is actually allowing energy transfer through it?
electrodacus:

--- Quote from: dunkemhigh on May 17, 2022, 08:56:37 pm ---
--- Quote from: electrodacus ---It all gets down to you thinking energy pases trough a capacitor...
--- End quote ---

So you're agreed that energy does indeed pass through a capacitor? That 1m gap without any wires is actually allowing energy transfer through it?

--- End quote ---

No electrical energy is transferred through that 1m gap.
There are no electrons flying from one wire to the other wire that is 1m apart.


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