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Veritasium "How Electricity Actually Works"
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electrodacus:

--- Quote from: SandyCox on May 20, 2022, 08:44:46 am ---You appear to be surrounded by confused people. What's the common factor? It's you!

--- End quote ---

Where is the confusion for you?

Do you understand the difference between energy that was stored and energy that did work ?
The process of storing energy in capacitor was in this case 50% efficient meaning that the 50% that was lost as heat on the wire is gone and the 50% stored in the capacitor is just that stored energy it did not do any work but it can be used to do work.
If instead of capacitor you will have had an electric motor that use 72mJ to move a weight from point A to point B then that will have been energy that has done work and it will have been gone no more 72mJ for you to use as you want.

If someone can not understand the difference between stored energy and energy that did work then I can not call him or her anything other than confused.
bsfeechannel:

--- Quote from: electrodacus on May 20, 2022, 02:54:27 pm ---If someone can not understand the difference between stored energy and energy that did work then I can not call him or her anything other than confused.

--- End quote ---

You seem to lack basic high-school knowledge of physics and electricity. That's why you don't understand what these people are talking about. Then you project your confusion on them, saying they are wrong.

Maybe it's time to revisit the basic concepts and try to understand what they're saying.
electrodacus:

--- Quote from: bsfeechannel on May 20, 2022, 07:09:16 pm ---You seem to lack basic high-school knowledge of physics and electricity. That's why you don't understand what these people are talking about. Then you project your confusion on them, saying they are wrong.

Maybe it's time to revisit the basic concepts and try to understand what they're saying.

--- End quote ---

Or maybe high-school physics and even university level is badly done.
School in general seems to be tailored to those that can memorize a lot of facts with no effort put into understanding them.

Here is an example to illustrate the difference between energy used to do work and stored energy.
So say you are the source of energy and you are pushing an electric vehicle on a flat road.
Vehicle is in neutral but there is of course friction loss so you put in 200Wh worth of energy and push the vehicle for 1km.
Now this 200Wh of energy did work.
Then at the same time I also push an identical vehicle and also expend 200Wh on the same flat road but I moved the vehicle just 100m = 0.1km because the regenerative brakes on the vehicle where engaged and 180Wh ended as energy stored in the battery.

When you look at this two systems the input energy was exactly the same 200Wh but in first case all energy input in the system did work while in the second case only 10% was used to do work the other 90% was stored as electricity and that stored energy can be used to do work but at this point in time it is stored energy and anything can be done with that not necessarily move the vehicle the other 900m but maybe just use the energy to listen to music on the car radio.

In this example there was an energy conversion from mechanical to electrical before storing unlike the capacitor problem where no conversion was done.
The 144Ws of energy delivered by the source was used to charge the capacitor with an fairly bad efficiency of just 50% so you end up with 72Ws stored in the capacitor but those 72Ws in the capacitor are still there in the original form of electrical energy ready to be used to do work.
Capacitor is an energy storage device that will not let current pass through thus no energy is passing through (the displacement current is just a mathematical concept not a physical current).
Something like displacement current or displacement energy is a fictional math concept for calculation purposes as maybe energy storage was harder to explain.
hamster_nz:

--- Quote from: electrodacus on May 20, 2022, 07:45:45 pm ---
--- Quote from: bsfeechannel on May 20, 2022, 07:09:16 pm ---You seem to lack basic high-school knowledge of physics and electricity. That's why you don't understand what these people are talking about. Then you project your confusion on them, saying they are wrong.

Maybe it's time to revisit the basic concepts and try to understand what they're saying.

--- End quote ---

Or maybe high-school physics and even university level is badly done.
School in general seems to be tailored to those that can memorize a lot of facts with no effort put into understanding them.

Here is an example to illustrate the difference between energy used to do work and stored energy.
So say you are the source of energy and you are pushing an electric vehicle on a flat road.
Vehicle is in neutral but there is of course friction loss so you put in 200Wh worth of energy and push the vehicle for 1km.
Now this 200Wh of energy did work.
Then at the same time I also push an identical vehicle and also expend 200Wh on the same flat road but I moved the vehicle just 100m = 0.1km because the regenerative brakes on the vehicle where engaged and 180Wh ended as energy stored in the battery.

When you look at this two systems the input energy was exactly the same 200Wh but in first case all energy input in the system did work while in the second case only 10% was used to do work the other 90% was stored as electricity and that stored energy can be used to do work but at this point in time it is stored energy and anything can be done with that not necessarily move the vehicle the other 900m but maybe just use the energy to listen to music on the car radio.

In this example there was an energy conversion from mechanical to electrical before storing unlike the capacitor problem where no conversion was done.
The 144Ws of energy delivered by the source was used to charge the capacitor with an fairly bad efficiency of just 50% so you end up with 72Ws stored in the capacitor but those 72Ws in the capacitor are still there in the original form of electrical energy ready to be used to do work.
Capacitor is an energy storage device that will not let current pass through thus no energy is passing through (the displacement current is just a mathematical concept not a physical current).
Something like displacement current or displacement energy is a fictional math concept for calculation purposes as maybe energy storage was harder to explain.

--- End quote ---

You do realize that you will be pushing 10x harder in the second case? 0.1 times the distance means 10x the force...
electrodacus:

--- Quote from: hamster_nz on May 20, 2022, 08:31:33 pm ---
You do realize that you will be pushing 10x harder in the second case? 0.1 times the distance means 10x the force...

--- End quote ---

I already mentioned that same amount of energy will be used 200Wh so the fact that you need to push harder is obvious.

In both cases the same amount of energy was used just that in first case all that energy was used to do work while in second case small amount was used to do work the rest was stored.
The stored energy can not be called work.
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