Steam engine pistons also move back and forth less than a meter at a time, and still could push trains a million kilometers in the forward direction. It’s that they’re pushing right while moving right and left when moving left. That’s like when current and voltage is in phase, delivering positive net power. Meanwhile, something that pulls left when moving right is consuming power.
In an AC system, the pedastal fan in your bedroom is electromagnetically coupled to the turbine at the coal/gas/hydro/nuc power station. They instantly and directly influence each other, and they both are spinning in tandem like two wheels on a car connected by an axel. Slowing the rotation of the fan with your hand technically increases the torque of the turbine, if only by an immeasurably small amount.
AC motors are more powerful but also more noisy. You need that power in your kitchen mixer but you need quiet in a fan. Modern WC rooms now have a DC fan.
So you’re admitting that AI data centers vibe pretty hard? Your words!
Elections merely facilitate the transfer the power, like (the non-leading edges of?) a drive shaft or cogs.
Even with DC you need a loop (well, a difference).
Carbon fuel one-use mentality where you burn your supply (chemically stored energy) doesn’t apply, tho non-rechargeable batteries make it seem so.
non-rechargeable batteries
Yeah, why are they still a thing? Recharchables have all the advantages but more.
It’s even crazier than that. It’s not even the electrons at the “leading edge” it’s the EM field they create even separate the of the wires that actually contain the electrons.
And the follow-up with a physical experiment after the first video started a huge drama.
No, the leading edge of the mechanical transfer of power - I was trying to make a faux comparison that electrons would be the inside of the shaft/cog & the fields the leading edges (that transfer the power & are moving more).
I mangled the comparison, should have given up on it. Vibes are hard to compare with anything non-vibes.
Great youtubing in the links, that’s how you get them views (benefit several creators and spread science)!
(*I just skimmed them for the general vibe, I’m not voicing support in case they are weird ppl, I don’t know them.)Edit: while speeding through I noticed a very cool simulation (software), yt/mcez0ri9yPY, these are very neat visuals.
My power company is charging me that much for nothing but vibes?!
It’s just the one electron… Allegedly
Mum says it’s my turn to use the electron!
Whats crazier is that in direct current individual electrons don’t travel at the speed of light through the conductor, but only at roughly 1cm/s.
Or, that thanks to the “skin effect” the current actualy travels in a very thin layer below the outside surface of cconductor. Most of the conductor doesn’t transfer power but only maintains the magnetic field to keep the current flowing.
No, skin effect only occurs on higher frequencies. That is why coaxial cabel is invented. But then they realized the energy in coax transfers in a completely different way.
That’s why you don’t have one thick copper cable but multiple thin ones.
I’m far from an expert, but that’s usually just for flexibility of the cable as far as I understand. Power wires inside the walls are one thick copper wire (or rather three for live, neutral and ground)
Correct, solid copper bus bars are also common in certain applications.
Well the “multiple thin wires” technique (litz wire) is more complicated than just having multiple thin wires (you need to braid them in a particular pattern because the magnetic fields that flow through the wires act on each other as well). But it is absolutely used for mitigating the skin effect as well.
Power lines inside residential homes are an exception because the frequency isn’t high. The skin effect for copper at that point is about 8.41 mm.
Then consider this wire gague chart
Even the thickest wires for carrying 300 amps has a radius less than 6 mm (you can also see that the rated frequency is 125 hz).
If you want to calculate the skin depth, use the formula
, where f is the frequency, p is the resistivity (copper - 16.78 nano Ohms), u is the permeability (copper - 1.256 micro Henry/meter).
why is everyone in this thread telling me to imagine something
So imagine a bus…
Does it leave every 21 frames?
Because imagination is everything- probably Einstein
The voltage(electrical equivalent of force) is what travels.
It’s analagous to pushing something away from you with a really really really long stick, then pulling it back again. The stick didn’t move much but you still affected something far away.
The electrons don’t move very quickly either. Like, a sluggish one millimeter per second is more current density than most metal conductors can handle without melting. Thankfully, there’s lots of mobile electrons carrying charge (coulombs) so that’s a lot of current. “Electricity” only travels near the speed of light because voltage is like a force sending waves through the electric field (simplified). And it’s instantaneous current (amps =
joulesedit: coulombs / second) times voltage (electric field potential difference in volts = joules per coulomb) that delivers power.Simplifying to a single harmonic (pure 50Hz/60Hz sine voltage source and a passive, linear RLC load), you need not only multiply the voltage’s and current’s effective amplitude (that gets you apparent power in VA, voltamps) but also their power factor or cos φ (the cosine of phase beetween them) to get power in W (joules per second). If the cosine is one, it’s a purely resistive ® load (like a heater) with a phase difference of 0°. If the PF is zero, it’s a purely reactive (L/C) load (a freewheeling synchronous motor is much like that) with a current phase of ∓90° and no power is consumed overall. If the cosine is negative, power is actually being generated by the device you’re measuring (for instance, old elevators and escalators with synchronous motors are actually delivering power into mains when enough people are travelling down).
Amps are not joules / second;- that would be Watts. Amps = Coulombs / second, and Volts = Joules / Coulomb. That’s why multiplying them gives you power in Watts.
That’s true instantaneously but as you say, if the current or voltage are alternating then you can’t just use the AC current and voltage to get real power like you can with DC.
You are correct, that was a mistake.
However, although symbols of units named after scientists (V, A, W, C, J, Ω, H, F, T, Hz, S, K, N, Pa, Bq, R, Ci) are uppercase, they are lowercase when written out (volt, amp(ère), watt, coulomb, joule, ohm, henry, farad, tesla, hertz, siemens, kelvin, newton, pascal, becquerel, roentgen, curie) to differentiate them from the surnames. Also be careful with degrees (Celsius, Fahrenheit, Rankine, Réaumur…) and grams (g, not G or gr), unrelated to the bacteria-ranking Christian Gram. And yes, the l/L debate is why the Claude Litre hoax was created. (In Unicode-capable applications I use 𝑙 BTW)
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Fyi, it isnt fully correct and a lot of electricity related channels were a bit annoyed by it. But overal its a good video hehe
Do you happen to know a good video about the issues?
AlphaPheonix has a few amazing electricity videos including this one where he actually does the experiment.
Veritasium’s video was so bad, like 15 channels made response videos within a week. Just search for, “is veritasium wrong about electricity”. It’s not that he was completely wrong, he was just doing lots of hand waving and making electricity sound like voodoo.
Watch mehdi electoeboom and Steve mould’s follow up argument about who is right.
Veritasium also made a follow-up video addressing their arguments. After that, they kind of went silent and seemingly sided with Veritasium
He really showed only induction in that video, that everyone knew about. And a very small current only goes in the first pulse. Rest of the current flows as you would normally expect. Electroboom explained it pretty well and this video didn’t really disprove or argue against that at all
My main concern with his video was a lack of a real explanation. He never once used the word induction, for instance.
The AlphaPhoenix video I linked proves Veritasium “true”. It wasn’t even a rebuttal, really. It’s just that he had a problem with what Veritasium was saying about current and what it means to light up a light bulb.
Just because no one made another video after Veritasium made a follow-up one, just means everyone was tired of the subject. I have not watched Veritasium’s follow-up video because his first one offended me so much I blocked his channel. It’s not the content that was wrong, necessarily, it was the way he presented it. It was all hand waving without trying to get people to truly understand the thought experiment. It pissed me off.
(I just edited my original comment to change rebuttal to response. Also, I removed all the other links because I haven’t watched them yet, so I can’t say anything about them.)
The microwave doesn’t heat your food, it just vibrates the water.
Heat is kinetic energy and the water is part of your food, so the microwave does heat your food.
imagine a bicycle chain between two sprockets, if you crank it foward and back like 1 inch, over and over again, you can clearly transmit power without the chain links going much of anywhere
Shit, that’s an amazing analogy.
This is analogous to saying, the blades on a wind turbine don’t go anywhere, they simply spin, and yet power is created.
You’re just wiggling the saw back and forth, yet the log is eventually halved
The washing machine just spins left then right, left then right, and the clothes come out clean.
The balls in the middle of newtons cradle don’t move either.
Newton’s cradle sounds like a kinky sex move, which is ironic since Newton was likely a virgin.
In certain kink circles, Newton’s cradle IS a kinky sex move!
I knew it!
Yeah. Sort of like holding two ends of a chain and dragging it back and forth. Even if the chain isn’t traveling the full length, it’s still moving and you could still extract power from the system if you attached something to the middle of the chain.
