Timeline for How current and potential propagate through electrical circuits?
Current License: CC BY-SA 4.0
10 events
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Sep 24, 2020 at 17:19 | history | edited | jonk | CC BY-SA 4.0 |
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Dec 12, 2018 at 12:03 | comment | added | Raafat Abualazm | I meant, what makes the E-field higher or lower. What makes it higher? I'm asking for the reason for this behavior, how it compensates. What makes the field stronger or weaker? How this conductivity makes it higher or lower in magnitude? | |
Dec 12, 2018 at 7:08 | comment | added | jonk | @RaafatAbualazm All of this, and more, can be found in a good book. I'd recommend reading chapter 19 of the 3rd edition (or later) of "Matter & Interactions," Chabay and Sherwood. | |
Dec 12, 2018 at 7:06 | comment | added | jonk | @RaafatAbualazm A resistor has far, far fewer conduction band electrons per cc. Look back at the equation and you can see that this is a divisor for the computation of drift velocity. So the drift velocity must be much, much higher. To achieve a higher drift velocity there needs to be a more intense electric field. If you think closely about 1000 identical \$10\:\text{k}\Omega\$ resistors in parallel with each other to make \$10\:\Omega\$, I think you will have an answer to your question on resistors. | |
Dec 12, 2018 at 6:53 | comment | added | jonk | @RaafatAbualazm The internal chemistry in a battery is rather complex and, in some cases, even includes "tunneling effects." But a simple view of a battery is like a capacitor, except that the charge on the capacitor is being continually refreshed (replenished) by a conveyor belt of sorts transporting electrons from the (+) to the (-) terminal. These electrons are acted on both by the Coulomb forces of the charges at the "plates" and by the non-Coulomb chemical processes doing the transport. The first opposes the second, and the second must exceed the first, for the battery to work. | |
Dec 12, 2018 at 6:16 | comment | added | Raafat Abualazm | But the explanation is great, I understood something now. | |
Dec 12, 2018 at 6:16 | comment | added | Raafat Abualazm | Another thing, how materials decide which values of Electric field to be present in them? Why Electric field in 10K resistor is more than 10 Ohm resistor? I don't get this point. | |
Dec 12, 2018 at 6:13 | comment | added | Raafat Abualazm | Umm, so the electric that accelerates is built up by the excess electrons not the battery directly? I mean it is not internal to the battery itself? | |
Dec 12, 2018 at 3:43 | history | edited | jonk | CC BY-SA 4.0 |
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Dec 12, 2018 at 3:37 | history | answered | jonk | CC BY-SA 4.0 |