Timeline for Why does a resistor need to be on the anode of an LED?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| Dec 28, 2020 at 20:21 | comment | added | endolith | @pr871 Electromagnetic waves don't move at the speed of light, either. They move at around 2/3 c in a coax cable, for instance. | |
| May 25, 2018 at 21:53 | comment | added | pr871 | @JohnDoe Electrons do not move anywhere close to the speed of light but rather mosey along at a rather leisurely pace called the drift velocity. However, electromagnetic waves (which carry voltage and current information throughout a circuit) do indeed move at the speed of light. | |
| May 25, 2018 at 21:36 | comment | added | John Doe | @xorinzor Not exactly: electrons move at roughly the speed of light, so there's not exactly a "speed-up" or "warm-up" time. It's more or less 0 to "full" (whatever full is) instantaneously. That being said, no matter what, if current is flowing through two or more elements connected in series, then that current is the same value for all elements in that circuit. | |
| Feb 22, 2018 at 17:19 | comment | added | Carl Raymond | We can describe circuits with equations well enough (with "lumped element" approximations, which do break down after a point) using rules like Ohm's law and Kirchoff's laws. Then we can solve the equations and find the voltages across components and the currents in the loops. Sounds like you're entering philosophical territory, asking "How does the resistor know? What's the mechanism?" Physical systems can arrive at the solution to the equations, and without a pocket calculator. How? I'm a hobbyist, so I can't say what's going through an electron's mind. Maybe a physicist can. | |
| Feb 21, 2018 at 16:20 | comment | added | xorinzor | Is it a correct assesment that the current starts at 0A and increases until it basically hits the limit of available passthrough? Because surely otherwise the order in which you place the components would matter, wouldn't it? just FYI, I'm an absolute beginner in electronics. | |
| Nov 1, 2016 at 6:02 | comment | added | Criticizing Israel not allowed | Or more simply, it's read as "the resistor must be connected to the anode", not "the resistor must be connected to the anode". | |
| May 2, 2011 at 5:35 | vote | accept | Spechal | ||
| May 2, 2011 at 3:07 | history | answered | Carl Raymond | CC BY-SA 3.0 |