General > General Technical Chat
Veritasium "How Electricity Actually Works"
electrodacus:
--- Quote from: dunkemhigh on May 19, 2022, 02:35:39 pm ---
You're jumping ahead. Regardless of the how, energy is either transferred across or it is not. Didn't we agree that there is insertion of energy on one side and extraction of same on the other? So therefore energy MUST have been transferred. The only thing in doubt is the exact mechanism.
Are you now disputing this already agreed fact (that there is a transfer of energy from PSU to resistor)?
--- End quote ---
Energy is stored not transferred. Can you just not imagine energy being stored ?
Even after you disconnect the battery there will still be energy stored in there and if you close the circuit by connecting a wire in the place of the battery current from capacitor will flow now in the opposite direction and all that stored energy will be doing work while capacitor is discharged.
IanB:
--- Quote from: electrodacus on May 19, 2022, 02:25:33 pm ---Since current is defined as flow of electric charged particles and since there are no electrons or ions traveling through that gap there is no energy transfer through that gap.
--- End quote ---
If you say that there is no energy transfer across an air gap, then you must say that radio does not work, that wi-fi does not work, that cellphones do not work, that wireless charging does not work, that television does not work, in fact the whole modern world does not work. How can this be?
IanB:
--- Quote from: electrodacus on May 19, 2022, 03:00:03 pm ---Energy is stored not transferred. Can you just not imagine energy being stored ?
--- End quote ---
Some energy was observed to go from the source to the load, so some energy was transferred by definition. Some energy was transferred, some energy was stored.
The transferred energy cannot be the same as the stored energy, or there would be something for nothing. In fact, you would have invented a free energy device. Do you wish to claim free energy?
electrodacus:
--- Quote from: IanB on May 19, 2022, 03:02:50 pm ---If you say that there is no energy transfer across an air gap, then you must say that radio does not work, that wi-fi does not work, that cellphones do not work, that wireless charging does not work, that television does not work, in fact the whole modern world does not work. How can this be?
--- End quote ---
All those work just fine but not the way you think.
The transmit and receive antenna are each the plate of a large gap capacitor and the circuit is closed through the ground (earth) as the common conductor.
You are charging and discharging that capacitor thus you see a current on both sides as loop is closed through earth.
You can have one transmit antenna and multiple receive antenna is like having a capacitor with one plate on one side and multiple plates on the other side.
If you made communication using lasers then yes energy will be transferred from transmitter to receiver as you are sending photons.
Also with lasers you do not need the return like ground as you get the photons.
There are no particles exchanged between the two plates thus no energy passes through that gap.
electrodacus:
--- Quote from: IanB on May 19, 2022, 03:06:14 pm ---Some energy was observed to go from the source to the load, so some energy was transferred by definition. Some energy was transferred, some energy was stored.
The transferred energy cannot be the same as the stored energy, or there would be something for nothing. In fact, you would have invented a free energy device. Do you wish to claim free energy?
--- End quote ---
The load in this case is just a conductor. If your main goal was to charge the capacitor then you will call this energy as lost.
There is absolutely no energy that is not accounted for. You seems to be the ones that try to ignore stored energy.
When you charge a capacitor from a source the energy provided by the source will be equal with stored energy and energy loss on the wire.
When you discharge that stored energy you get the same loss again with current flow in the opposite direction.
You will have a problem adding some extra energy that crosses the gap as there is nothing more than stored and lost on the wire coming from the source.
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