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| Veritasium "How Electricity Actually Works" |
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| hamster_nz:
--- Quote from: electrodacus on May 20, 2022, 03:12:23 am --- --- Quote from: hamster_nz on May 20, 2022, 03:10:20 am ---The battery. Those electrons didn't just get into the capacitors by themselves now did they? --- End quote --- Losing half the energy as heat is not enough ? You can say they went downhill. --- End quote --- Oh, on second read your question it makes no sense.... I missed the extra "did" on the end. |
| electrodacus:
--- Quote from: hamster_nz on May 20, 2022, 04:17:46 am --- Oh, on second read your question it makes no sense.... I missed the extra "did" on the end. --- End quote --- What question are you referring to? Storing 72mJ in the capacitor resulted in 72mJ lost as heat so you can say charge efficiency is 50% This charge efficiency can be improved to at least 90% if if you add as a minimum an inductor and diode as demonstrated in the past. Also that 50% loss can be converted to something other than heat like maybe visible light by adding a lamp in series (just one example of many posible). |
| electrodacus:
--- Quote from: IanB on May 20, 2022, 03:26:03 am --- It's fascinating seeing how many different ways he can come up with to argue that black is white, but yes, it does get boring after a while. --- End quote --- You are making the black white. Energy stored is just that and not work. Claiming a charged capacitor has no stored energy is just absurd. |
| IanB:
--- Quote from: electrodacus on May 20, 2022, 04:30:46 am ---Claiming a charged capacitor has no stored energy is just absurd. --- End quote --- Of course. That is why nobody has ever claimed that. --- Quote ---Energy stored is just that and not work. --- End quote --- On the contrary, work is energy stored, heat is energy lost. Here's a reference: https://openstax.org/books/university-physics-volume-2/pages/8-3-energy-stored-in-a-capacitor --- Quote ---To move an infinitesimal charge dq from the negative plate to the positive plate [of a capacitor] (from a lower to a higher potential), the amount of work dW that must be done on dq is dW=Vdq=(q/C)dq. This work becomes the energy stored in the electrical field of the capacitor. In order to charge the capacitor to a charge Q, the total work required is... --- End quote --- |
| Alex Eisenhut:
--- Quote from: electrodacus on May 20, 2022, 04:30:46 am --- --- Quote from: IanB on May 20, 2022, 03:26:03 am --- It's fascinating seeing how many different ways he can come up with to argue that black is white, but yes, it does get boring after a while. --- End quote --- You are making the black white. Energy stored is just that and not work. Claiming a charged capacitor has no stored energy is just absurd. --- End quote --- I don't think anyone claimed that. Does a capacitor store time? |
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