Static?

[Speedskater]

So by the same logic a battery on the shelf is not DC either, as there is no current flowing? I can read it with a voltmeter, and have to choose between the AC and DC scales. Now I have to relabel the scale that reads battery voltage to DP? Not happening.
As soon as there is a static spark or a shock, current is flowing!

Ah, but if you connect the battery to a load, current will flow for some period of time.
But a static shock only lasts for a fraction of a second and looks more like one half of an AC cycle.

 

[retirede]

Ah, but if you connect the battery to a load, current will flow for some period of time.
But a static shock only lasts for a fraction of a second and looks more like one half of an AC cycle.

Every DC circuit is half an AC cycle every time it’s switched. Just much lower frequency.

 

[FionaZuppa]

Every DC circuit is half an AC cycle every time it’s switched. Just much lower frequency.

Batts should be called "one way" current sources, and not "DC". AC is a bunch/infinite set of small DC segments. It's all DC.

 

[kwired]

Every DC circuit is half an AC cycle every time it’s switched. Just much lower frequency.

More like a 1/4 cycle when switched on, straight line at steady loading and the second 1/4 cycle when switched off.

Rectified DC with little or no smoothing capacitors can sort of resemble AC current as well.