Instead of the sane approach of specifying 5, 9, 12, 15, and/or 20 volts and the amperages, products insist on listing every model of device in existence instead.
Most will do 12V, but I always want to make sure it’ll power my laptop (20V) as well.
A big thank you to reviewers who post images of the actual products where it shows the relevant info in one short line on the labels:
e.g. PD Output: 5V=3A, 9V=3A, 12V=3A, 15V=3A, 20V=3A
For some reason, “amperage” mildly infuriates me. It’s current.
Voltage equals amperage times ohmage.
Ohmage? You mean resistance?
That’s the joke. Edit: oops, you got the message already! 😂
That was the joke. They are making everything in the equation end in -age. Because “amperage” bugs them.
Volt + age
Amper(e) + age
Ohm + age
In other words, ohmage is an homage to amperage.
Then why doesn’t “voltage” bug you? It’s the same sort of word: unit + “age”.
To fully satisfy you, it should be:
electrical potential difference = current * resistance.
Potential or electromotive force. “Voltage” is long accepted. The only use of “amperage” you’ll find in The Art of Electronics is in the index: Amperage, see current. Ampère called current “intensité du courant”, hence I in V = I × R.
I don’t know why it bugs me. This is Mildly Infuriating… The place for nitpicking! 😅
Agreed, and thanks for the history lesson!
Why is ‘voltage’ fine then?
Because potential sounds weird?
Tension.
Tension makes me think of how one “can’t let go” if high-voltage AC is flowing through their arms. 😬
…and warnings in multiple languages. HAUTE TENSION!
It only sounds weird because you’re used to ‘voltage’.
And wattage only sounds weird because you’re used to power.
Where did I say wattage sounds weird?
I guess ohmage was the one that f4f mentioned.
I raise you “cubic capacity” meaning volume.