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| Is this the so called zero ohm resistor? |
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| helius:
--- Quote from: Howardlong on September 25, 2019, 06:21:49 pm ---Then there is the ultimate nerd and pedant paradox, it can’t be a resistor if it’s zero ohms. --- End quote --- Even a (normal) conductor can't be zero ohms! Only superconductors can. But in practice we only care about resistances that visibly affect the circuit. In low-power or signal circuits, several milliohms is as close to zero that the difference isn't significant. In high-power delivery systems, those milliohms matter a lot more. |
| Kilrah:
--- Quote from: Howardlong on September 25, 2019, 06:21:49 pm ---Then there is the ultimate nerd and pedant paradox, it can’t be a resistor if it’s zero ohms. --- End quote --- We should probably call it the "insignificant resistor" then... or "packaged wire" :-// |
| Bud:
Put your finger on it while measuring, problem solved. |
| Gyro:
--- Quote from: Howardlong on September 25, 2019, 06:21:49 pm ---Then there is the ultimate nerd and pedant paradox, it can’t be a resistor if it’s zero ohms. --- End quote --- I have to admit that I find the fairly common practice of suppliers listing them as +/- 5% tolerance is rather amusing. Definitely worth getting a batch and weeding out those -5% ones. |
| ogden:
--- Quote from: Gyro on September 25, 2019, 08:22:28 pm --- --- Quote from: Howardlong on September 25, 2019, 06:21:49 pm ---Then there is the ultimate nerd and pedant paradox, it can’t be a resistor if it’s zero ohms. --- End quote --- I have to admit that I find the fairly common practice of suppliers listing them as +/- 5% tolerance is rather amusing. Definitely worth getting a batch and weeding out those -5% ones. --- End quote --- 0R with proper datasheet have non-zero resistance specified. In result +/-5% spread do not look weird anymore and you can put away your free energy generator plans. |
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