of course, this was obviously good from the very beginning, vyacheslav aleksandrovich, well, okay, buth one is better ? well, if you imagine a river , there are electrons like droplets, so they are all moving in one direction, this is a direct current, and if they start to move chaotically in different directions, this is already variable, respectively wire, depending on what kind of wire, if we are, well, mostly common, of course, during transmission. energy and alternating current, this has its advantages , because in order to use less wires over a smaller cross-section to conduct current, you need to increase the voltage, increase the input voltage accordingly, and then, on the contrary, lower it, uh yes, that is, from high to low, but this is an expensive process, it is expensive for direct current, for alternating current due to transformers and so on, it is quite cheap to do, therefore they are used, and this is... the properties of a constant variable, why when they run in a straight line, they are not confused, why not, they run normally, but they need to be converted from volt