4 ms·
I agree. But how would you have phrased it?
by colonwqbang 7y ago
I agree. But how would you have phrased it?
- analog31 7y agoI would have started with the relationship between voltage and current in a simple circuit. For instance, the more voltage is applied, the more current typically flows. Resistance and impedance are terms for the ratio between voltage and current in some kinds of simple circuits. And so forth. I'm using the fiction of a "simple" circuit to avoid going down a rabbit hole of detail that would be unnecessary here.
- zhsvszkvx 7y agoThe ratio of voltage and current in the complex plane. Drop the “harder” and “easier” analogies with Ohmic resistors. They’re confusing, with impedance you’ve gone up a level and the analogy breaks down. Even “matching” Z is kinda meaningless if you don’t express it as a complex quantity: what you’re trying to match is not |Z| but Z* (otherwise it is possible to match |Z| And deliver no power! In practice matching |Z| is good enough) What if you don’t know about phasors and Fourier transforms? Doesn’t matter, don’t look down on people to over simplify. Use the magnitude and angle formulation of complex numbers and build on that with pretty pictures.