When HN users recommended it
1 HN user recommended this in 2021, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2021, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
The problem is that his video is a mish-mash of two different concepts that were taught perfectly well in my freshman physics course. One is that the electric field travels down a wire at the speed of light while the electrons do not. The other is induced currents by moving charges.
I got the answer "wrong" by watching the video because I didn't consider the tiny amount of current induced in the other wire to be sufficient to turn on the light in any useful manner. If you had replaced the light with a sensitive ammeter and asked me what the first point in time there would be any measurable deflection from zero, then I would have gotten it correct.
Could have also just asked how this works, and the success rate would have gone way up (but he'd have lost all his clickbait):
https://www.amazon.com/Fluke-324-Temperature-Capacitance-Mea...
Ask bad questions, get bad answers. Nothing wrong with how physics/EE is taught.