If you don't know how to use KVL, it doesn't mean that KVL doesn't work!
This is a pretty good conclusion, actually.
Any tool can be used to solve any arbitrarily generated problem, to prove anything, as evidenced by all those weird videos showing a specific way of doing a thing which has no practical application (and which is also not the same experiment as Lewin's, so why do it to prove anything about Lewin's experiment is beyond me
).
Look at it this way: Lewin has shown an
experiment where clearly the measured outcome doesn't match with KVL. This is undisputed. You guys are spending great effort in building significantly
different experiments (to the point they look something completely else even to a plumber's or carpenter's eye) that shows that in these experiments, KVL holds. Yet when suggested to add small modifications to the experiments, you won't do it.
What's the point? Like, world is literally full of circuits where KVL works, no one says it isn't a useful tool that works in most everyday circuits. It's the workhorse of basic calculations in the whole electronics industry. What's the deal? My current interpretation is, it's all because Mehdi "set up the stage" to make it like an
attack against some
good thing which is KVL. The rest just follows. This is ridiculous. Look, it's originally a
university lecture. It's not aimed at
practical engineers. The target audience are people who can deal with such stuff, analytically, using math, and don't take an offense on behalf of their favorite tool.
So practical engineers like myself continue using KVL every day. It is a really suitable tool for so many circuits we engineers design. Actually, I have never had to resort to either expensive EM simulation packages, or hand-calculating with Faraday's law. I'm pretty sure latter is very rarely done in modern days circuit design. For me, assuming lumped components, and radio stuff only inside radio modules which I keep within the suggested physical separation away from the rest of the circuit, using online transmission line impedance calculators and Spice simulations has been enough.
Again, I don't have to master everything, that's why we have teams of people.
But this all gives the false impression that the underlying physical laws are not important. No, there are and always will be difficult cases where deeper understanding,
and better tools than Kirchoff laws are required. You or me might never encounter them. But Lewin's original experiment sure is one, that's undisputed - the result does not match the calculation. Now you can claim that the experiment is
wrong ("wrong probing" is part of the experiment), and for some sake of "KVL justice" it needs to be modified using "good probing"; but sorry, that's only an opinion of yours. In my opinion, no experiment is wrong, if the aim is to gain understanding. Here, it helps gain understanding that the actual physical definition of voltage is pretty weird to us practical engineers!
It's actually quite similar to the "Arduino hobbyist fallacy" when Arduino was blog-credible over a decade ago. I was constantly lectured at that my skills of designing circuits are superfluous because you can always buy an Arduino shield which does that. Well, that is seemingly true to many, but
someone has to design the products and circuits that do not exist at yet. Someone has to design those Arduino shields.
Similarly, someone has to design those RF modules, those 5G base stations, GPS satellites, and so on. These will always contain subsections where KVL does not work.
If you work there, you can't say "hey, I modified that circuit to look - and perform - physically different to be able to use KVL, because KVL is good if you do that". No, KVL has no such value. It has only value as a tool.
Then again, if my circuits end up being inside strong varying magnetic fields, I can just choose to call that "interference", and try to follow the rules-of-thumb of EMC design. Again, if the field is strong enough to matter even after that, I can call "foul play", clearly there is a radiating source that exceeds the EMC regulations. Again, Faraday avoided
.
And a carpenter doesn't need to know shit about metallurgy, yet is still able to hammer in nails. But someone's got to do it.