How Electricity Actually Works
Why Hacker News recommends it
HN cites it for the field-based picture of power transfer, noting it was controversial at release but the experiment largely backed the creator.
What it is
Veritasium explores how electrical energy actually travels in a circuit, arguing that it flows through electromagnetic fields around the wires rather than through the electrons. It builds a long-cable experiment with Caltech to test when a distant bulb lights.
Recommended by 4 HN commenters across 3 different months, 2023 to 2026.
What Hacker News said
Strong rec blueplanet200 · 2023-09 · on “Why does water change the speed of electricity? [video]”
"How Electricity Actually Works" ( [this video] ) from Veritasium is related and also a fantastic video.
Recommends jerf · 2023-09 · on “How the Most Useless Branch of Math Could Save Your Life”
The video in question for reference: [LINK] Interestingly, when I saw that I figured this channel for a goner because he was going to turn to the darkside, but quite contrary to expectations I feel like his channel has actually blossomed since then. His older videos are fine, but often just explaining concepts that you can find a lot of other explanations on, but some of his recent videos have rocked the boat even among physicists and IMHO he was ultimately proved to be correct for them. I particularly point at his videos about how nobody has measured the one-way speed of light ( [LINK] ), which was well-known among people very very deep in the field of relativity but not very well known out
Recommends lugoues · 2024-06 · on “Why does current flow the opposite way from the electrons?”
Sort of, electricity and magnetism are two sides of the same coin, electromagnetism, so it's waves in the electromagnetic field with the wire acting as a wave guide. (as far as I understand) Veritasium has a video that goes over this. It was pretty controversial at release but it gives a good overview. [this video] And why magnets work due to relativity [LINK]
Recommends leonidasrup · 2026-07 · on “A.I. Companies Are Recruiting Electricians and Carpenters by the Thousands”
Good intrpduction are Veritasium videos: "How Electricity Actually Works" [this video] "The Biggest Misconception About Electricity" [LINK]
Cites H8crilA · 2023-07 · on “U.S. Marine Corps Antenna Handbook (1999) [pdf]”
You can invalidate the circuit theory with, well perhaps not $50 worth of hardware, but a bit more: [this video] I'm not sure how do you plan to invalidate Maxwell's theory, which shows that energy flows entirely outside of wires, with $50. It would be very much welcome in the physics community. This misconception is even more widespread than "planes fly because of Bernoulli" because it's so incredibly useful when designing most circuits/PCBs. Though it is, fundamentally, a lie. PS. Circuit theory is made to match reality for the case showed in the video via the concept of a transmission line.
Cites cogman10 · 2023-08 · on “LK99: Team of Southeast University observed zero resistance below 110 K”
> Is there any understanding as to why superconductivity breaks down at higher amperage? This is a good read [1] > As long as the induced magnetic field at the edges is less than the critical field, the material remains superconducting, but at higher currents, the field becomes too strong and the superconducting state is lost. This limit on current density has important practical implications in applications of superconducting materials – despite zero resistance they cannot carry unlimited quantities of electric power. Tl;Dr (and probably wrong) as current flows through any conductor it creates a magnetic field. In superconductors when that magnetic field gets too strong it impedes current f
Cites ben_w · 2023-11 · on “Metals: Where Electricity May Flow Without Electrons”
There was a whole mess of STEM YouTubers arguing about this last year, e.g.: [this video] TL;DW: the power is transferred by the electric fields, it's the electric fields which move the electrons, if there's a break in the circuit the electrons necessarily accumulate in the places that minimise the electric fields.
Cites antihipocrat · 2023-12 · on “Veritasium: The SAT Question Everyone Got Wrong [video]”
In response to all the controversy he made a follow up video [0]. In the video he recreated the experiment, explaining the effect in a more technically correct manner and also apologised for not doing so on the original. He also made it clear that the light globe in the original video did not receive enough current to light up.. it was hooked up to an alternative power source and an oscilloscope and upon receiving any signal above baseline would switch on the globe. [0] [this video]