"From what I've read, some people refer to P=VI as "Watt's Law" but others seem to say Watt's Law is more a commonly applied term than an official term."
There is and never has been any such thing as "Watt's Law". The only mention of this phrase that I have seen have been found in sources that do not demonstrate any level of engineering expertise. It would seem somebody made up the name because of the visual similarity.
My only points (paraphrasing) have been that P=IV uses 2 values that are also contained in V=IR and that with a knowledge of 2 of the four (V,I,R,P) you can solve for the other 2.
If that's what you meant, it was not clear in the words you used.
You can debate this further but I don't know why.
I wouldn't debate this. If you thought I would, then you really interpreted my comments incorrectly.
To put the thread back on track (as opposed to debating like lawyers who insert their own words within each new draft while arguing about t crossing and i dotting), the original questions in the very first post at the top of this thread were and still are:
Net, net: If P=VI wasn't a concept put forward by Georg Ohm, and given that the relationship of P=VI doesn't seem to be attributed to him, who was first to figure out P=VI, when did the discovery of P=IV occur, who was first to start calling P=VI "Watt's Law", and when did the naming convention of P=VI as "Watt's Law" first appear?
Ohm did his work 1825 and 1826 and published his results in 1827.
Joule published his work that the heat generated from and electrical system was
proportional to the square of the current times the resistance: I
2.R around 1840. So, if you wanted to put a name against a "Law" relating to power, then you'd be less wrong by referring to Joule. But he's already got a unit name after him for energy.
Who "worked out" P=VI is going to be the first person who did the substitution of Ohm's Law into Joule's equation. That's like asking who was the first person to write Ohm's Law as R=V/I.
And, repeating: There is and never has been any such thing as "Watt's Law". The only mention of this phrase that I have seen have been found in sources that do not demonstrate any level of engineering expertise. It would seem somebody made up the name because of the visual similarity.
In other words, I see that it was created out of ignorance - something I would expect from the half-baked "information" that is spewed out on the internet.Besides, James Watt died in 1819 and being more of a mechanical engineer, putting his name against this is absurd.
So, please, let's drop this term.