General > General Technical Chat
Veritasium "How Electricity Actually Works"
hamster_nz:
The person pushing the car has done the same amount of work. Just in the first case more got 'lost' to the environment.
electrodacus:
--- Quote from: hamster_nz on May 20, 2022, 09:05:08 pm ---The person pushing the car has done the same amount of work. Just in the first case more got 'lost' to the environment.
--- End quote ---
We are not discussing the source.
Yes 144mWs where provided by the source in capacitor charging example that is the equivalent to the person providing 200Wh in both cases.
The result was 72mWs of heat loss in the wires transporting the energy to capacitor and 72mWs of stored energy in the capacitor.
The result for vehicle examples was in first case 200Wh of work for moving the vehicle 1km
For second example there was 20Wh of work to move the vehicle 100m and 180Wh of energy stored in the EV battery.
Those 72mWs stored in capacitor and those 180Ws stored in battery are are not work. The energy stored there can be used to do work at any time but at that moment it is just stored electrical energy which is not work.
hamster_nz:
Are you really arguing that work is not required to store energy in capacitor (or in this case a cars battery)?
Are we in Humpty Dumpty land again, where words only mean what you say the do?
electrodacus:
--- Quote from: hamster_nz on May 20, 2022, 09:50:24 pm ---Are you really arguing that work is not required to store energy in capacitor (or in this case a cars battery)?
Are we in Humpty Dumpty land again, where words only mean what you say the do?
--- End quote ---
If transfer could be done at 100% efficiency then yes no work will be done to transfer energy from source to capacitor.
In the particular example efficiency was just 50% so half of the energy ended as heat during transportation.
You can use a DC-DC converter and transport the energy with about 90% efficiency so that only 10% is lost for moving the charge from a source to a capacitor (energy storage device).
What part exactly is not clear.
PlainName:
--- Quote ---What part exactly is not clear
--- End quote ---
How the resistor manages to consume energy without there being any transfer from one side to the other.
This diversion to how capacitors charge and at what cost, etc, is simply your smokescreen that you hope will obscure your inability to deal with the real issue.
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