About alternating current and current strength?

Question

Electronics

Tell me, is the definition of "alternating current" not entirely successful, and is it more correct to talk about alternating voltage? The same question about "current strength" in electronics as a scalar quantity, while force in mechanics is a vector quantity, and vice versa "current density" is vector in electronics and scalar in mechanics? I understand everything how it works, there is no need to write about it, but I still think there is some confusion with terminology ...

Answer 1

Simplified view from the chair:
Useful work is created by current. And since it enters the power formula in a square, then its direction doesn’t matter.
When calculating currents and voltages according to Kirchhoff's rules, the currents are quite a vector.

Answer 2

First, there is an alternating voltage, connect a consumer there - and there will be an alternating current, according to the consumer. Yes, and in the outlet too, there is only one circuit ... But the alternating voltage has not gone away either. In general, if we talk about the included consumer, then it is more correct to say that alternating current flows through it. Well, you can say tension, as you like. But if the consumer is not turned on, then the alternating current cannot be said, only the voltage.

Answer 3

There is both alternating current and alternating voltage. A variable in electrical engineering means changing along a sine / cosine (according to a harmonic law). In school formulas, vectors are usually used little. The Ampere / Lorentz forces, magnetic flux and so on - is explained through a stump-deck - through a formula with sines, cosines and rules of all kinds of different hands, although these are just products of vectors - scalar and vector.