Timeline for Is the association of useful work to active power a convention?
Current License: CC BY-SA 4.0
4 events
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| Aug 24, 2021 at 7:54 | comment | added | tlfong01 | Ha, you confused more. (1) I agree that the mathematical definition is clear: E = L * I². (2) So you should also agree the following: if I increases, E grows; and when I decreases, E shrinks. (3) Now let us look closely at an inductor based (electromagnetic) buzzer. As you said, the buzzer can be electrically defined as a "pure" resistance in series with a "pure" inductor. (4) Please let me know if you agree with (1), (2), and (3) above, or you would like to have more comments, before I move on. | |
| Aug 24, 2021 at 2:28 | comment | added | Hearth | @tlfong01 The mathematical definition is quite clear. The energy being dissipated in the form of sound appears, from an electrical point of view, exactly like a resistance in series with the inductance, shifting the current phase closer to the voltage phase. | |
| Aug 24, 2021 at 1:13 | comment | added | tlfong01 | Well, it is a matter of definition. Reactive power is that of reactance, eg of an inductor. An inductor based buzzer can do useful work in the "real" world. In other words, "reactive" power is "real" power. | |
| Aug 24, 2021 at 0:31 | history | answered | Hearth | CC BY-SA 4.0 |