Levitating Barbecue! Electromagnetic Induction
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- Опубликовано: 8 окт 2012
- At the Palais de la Decouverte in Paris, they showed me this experiment where a 1kg aluminium plate is levitated above a large coil of wire that is being supplied with 800A of alternating current at 900Hz. This is by far the best demonstration of electromagnetic induction I have ever seen.
Back in London, I visited the magnetic lab of Michael Faraday in the basement of the Royal Institution. It was here that he did his groundbreaking work on induction. People had previously observed that current in a wire causes a compass needle to deflect, but more exciting was the prospect of using a magnetic field to generate current. Faraday created his famous induction ring by winding two coils of insulated wire onto an iron ring. When he connected a battery to one coil, a small pulse of current was induced in the other. When the battery was disconnected, current was induced in the other direction. This led Faraday to the conclusion that current was induced in the second coil only when the magnetic field through it was changing.
And if they hadn't been wrapped on the same ring, Faraday may have noticed that the two coils repel each other when the current is induced due to the interaction of their magnetic fields. This is the same thing that is happening with the aluminium plate, except we're using alternating current to create a continually changing magnetic field. This induces an alternating current in the plate, producing an opposing magnetic field which levitates the disk.
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You didn't mention the elctricity bill of this device, though.
or the sound if u use it as a dinerpiece
Think about the electricity bill of Maglev trains
He didn't mention the voltage either. If it runs 800 amps at only one volt, then that's only 800 watts which is the same power as a small microwave oven and less than half the power you can get out of the average wall socket, so it wouldn't be expensive to run. The big thick cables are needed for the high number of amps, but it doesn't necessarily mean high overall power.
i was thinking the same, it does look like one of the most inefficient ways to heat up a steak
@@ersetzbar. Induction stoves are way more efficient then heating coil stoves or gas stoves.
Guy: "Don't put the lamp too close"
Derek: Immediately tries putting the lamp directly on it.
That's how physiscits reacts XD
I think he meant his hands though, because of the possible burns on his skin. ;)
I really wanted to touch the levitating plate, but then they showed how hot the plate is.
+Czesnek you can still do it, in glove protecting from heat I guess
+Czesnek This is essentially an induction heater.
Am I wrong about this essentially having the power to fuel a rocket? The earth gives off a magnetic field, if that field can be used as both an electrical current (Tesla!!) and a magnetic field then what keeps it from happening?
+josiah meade changing magnetic field induces electric field. Changing electric field induces magnetic field. From our perspective, magnetic field from earth isn't changing.
Quite a lot of satellites use a similar method to orient themselves in a specific direction. They have a long arm with coils at the end. When the pass current through one of them, the resulting magnetic field interacts with that of the earth and produces a force that turns the satellite in the desired direction.
en.wikipedia.org/wiki/Magnetorquer
Who needs magic when you've got Physics?
Me!
@@syfou725 lol I tried to clean your profile until I realized it was ur profile 😂😂.dat fly.....
@@rhyme5218 :)
same thing
@@user-tz7yb1hi1v loll
It was apparently 800V, so you can do the math on the resistance ;)
Hi veritasium :)
Hi veratasium translation: hi guys
Only 20 likes from 10 years ago?
800 V / 800 A = 1 Ohm
"Tell me this is not the best dinner center piece"
*EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE---*
So interesting please remake this video I want to learn more. You’ve gotten so much better at explaining and making visual effects to help understand what’s going on with the physics.
Thanks for the video
1:24 What's a _wah_ ?
...
...Oooh, he means "wire"!
And wa-a means water
@@JoeMakaFloe Or "wo-'ah"
I think it's wire
@@JoeMakaFloenot in that guy's accent lol his accent is very upper-class, old, southeast so that's not a feature of his dialect. In his accent he would pronounce it wate(r) with the t pronounced correctly and clearly. You don't usually drop the t in a word like water and make it a glottal stop in most accents, just the cockney accent and its modern variants. Lots of other accents (more middle-class ones) would turn the t into a d-like sound, like wade(r). Most people would also pronounce wire with a y sound these days, like wiye(r), his accent is somewhat archaic.
Had a trip to Paris this week to meet a friend, took some time apart to go to this place 'Palais de la Decouvet', saw all the electromagnetism demonstrations they do, not only this one, and many other interesting experiments in other areas of physics. The whole experience was amazing. Wouldn't have known about this place if it wasn't for you. I sincerely thank you for that.
Everything is science. This is just called being knowledgeable.
Does being knowledgable also mean to have your ears constantly raped?
..
Thank you for this video! In the Museum of Science and Industry in Chicago, in the late 50s and early 60s when I was a kid, they used to have a similar device that worked the same way. It was demonstrated in the Electric Theater. That one was relatively portable (with casters) and smaller: IIRC, the size of a large hassock.
The demonstrator would wheel it on stage and show the levitation of the aluminum plate. He (always "he" in those days) didn't have the light fixture, though. He never mentioned any of the electrical specs, but the machine gave off a distinct hum. He did show that if you pressed down on the plate, the humming would get louder. That showed the plate didn't get that hot in the short demo time, so spraying water on it wouldn't be dramatic (but he did mention the plate got warm). Also, the machine didn't have anything to prevent water from dripping into it.
The Electric Theater was so cool! It was my favorite place. First time I saw strobe lights, UV light, and a microwave transmitter as big as a refrigerator. The last had two small plates on bars on the front (transmitting antennas, I guess), and he had an ear of popping corn on a stick that he placed between them, and the corn would pop on the ear! You could smell the fresh popcorn! Totally magic at the time! Imagine how I felt when compact microwave ovens started showing up around 1970!
He also had a setup that would catch the shadow of an exploding balloon with a synchronized strobe flash on a phosphorescent screen! Now anyone can see high-speed videos of that, but at the time it was completely WOW!!!!!!!
Wow, that's some incredibly amazing stuff Derek. Thanks for making this video! Idk why I was so surprised by the light bulb part.
Yea me too idk why too
Please make more videos like this. I absolutely love the history of science!
This is the coolest thing Iv'e ever seen.
Who's Iv?
I think You nailed it when it flew up and I was like Whoaaahhh.... The light bulb part. Fantastic!!!
Thanks for making such amazing videos. Thanks for sharing and exploring. You're truly amazing.
Every students need to see this experiment for better understanding.
I was a Hull Technician in the Canadian Navy, serving on a Destroyer. I switched on our welder, and the cable was mounted on the steel wall, coiled up. As I passed this cable, all the tools shot out of my belt and stuck to the wall inside the coil. I learned an interesting lesson about magnetic fields.
Faraday - Attempting to create the Arc Reactor before it was cool.
R.I.P. Headphone users. :(
Seriously. A warning would have been nice. I think my eardrums are bleeding.
:)
:-()
I have headphones but luckily I wasn't wearing them but my ears hurt🎧👂🏻
This was one of the coolest videos and phenomenon ever!
Electromagnetic induction is awesome! I've wanted to get a miniture version of this huge coil for my room for a while now. It's called the Levitron Revolution!
Awesome invention, it levitates, gives you light, and you can cook on it.
its not really an invention. its been always there. just somebody had to put it togethor
xXxViDeOxXxKK
Well this invention does suck because there's no way to upload a selfie to Instragram
xXxViDeOxXxKK Sorry, where exactly was it before somebody put it together?
alexgrinkov Absolutely! I can't count the number of times I have got into difficulty cooking a meal at my oven and thought, "damn, if only my oven levitated".
alexgrinkov u need some sort of vaccum and a filament to perform the light part... and, you don't know how much the bill pays if you had ths on your house
Michael Faraday is my favorite
do you know faraday was the worst at math? that is why it took awhile for his work to get recognized cause no one understood what his work actually meant since it was just drawings and experiments, no analysis of the work. it took james clark Maxwell to analyze the work and actually shape it so that it could be published. they are both great scientists none the less. just thought I'd share the cool piece of info I had on your hero.
Yes! Learned that from a documentary I saw on tv, Science Channel I believe.
Faraday and Tesla are my favorites!
I love Tesla, I fell in love with Tesla ever since I watched the show Sanctuary. Do you guys know about it? Great show, Johnathan young does a great job playing Tesla.
HolyFuckinSex He was mysoginistic and cruel though.
your videos are really good. i could watch for hours.
This. The most awesome video I saw on RUclips. Ever.
Damn, did you say 800 amps? That's like the total electric current running through all the houses in my neighborhood. Good luck to the prospective hoverboard builders who think they can co-opt this technology into practical transportation.
+Alan Falleur 800 amps isn't really that bad. Since the wire is so thick and there are few turns, I doubt that the voltage is above 1 volt. So that makes 800 watts, or 6.67 amps at 120 VAC. 800 amps in your neighborhood is 96 KW.
EGL24Xx I'm just talking about the current this thing draws, not the power. The strength of a magnetic dipole induced in a coil is proportional to the current in the loop. This thing will drain an 8 amp hour battery in 36 seconds. Bad news for the hover boards, I think, if you need that kind of current to run it.
+Alan Falleur You're talking to an electrical engineer grad student... Yes the field strength is proportional to the current; no that isn't relevant. This coil wouldn't drain an 8 AH battery in 36 seconds for multiple reasons. First, there is no way a battery that small could provide that much short circuit current due to ESR. Also, capacity deceases the faster you drain a battery. Trying to pull 800 amps directly would reduce the battery to less than 1 AH. But again, that isn't relevant. The coils go in the ground, the board is just a low resistance piece of metal. But here's the thing, you need to talk about power. You would use a transformer to create large currents at low voltages with great ease. I've run 2000 amps through a cable loop I put through a high capacity toroidal transformer while drawing 3 amps on the primary. An 8 amp hour battery could be used in a buck supply to create low voltages with much higher current. There are a lot of things you aren't considering here...
EGL24Xx Kind of a hostile tone you have there. (¬_¬ ) Good luck with the hoverboards.
+Alan Falleur lol :D
Nice to see a demonstration which such beauty. Bacon and eggs anyone??
It is the best science channel I've ever come across... Love you to peaks.💖
Okay. This is the best thing I've ever seen on RUclips.
SUBSCRIBED!
3:09 "Best dinner table centre piece" at 800Amps? an expensive one too!
I heard they'll be fixing this in the next update.
I want more videos like this.
Michael Faraday...One of the greatest minds that ever was yet hardly know outside of the scientific community! Definition of a paradox right there!
The floating plate with the high frequency in the background looked like it was from a horror movie.
I laughed out loud when I saw this. And the anti-gravity wheel is one of the neatest things I ever saw. My jaw literally dropped. I almost wept. What are we doing with our science? Still running our cars on gasoline. I get pissed thinking about this.
This is absolutely fantastic!
i really love scientific videos, you learn something new everyday and it makes you realize that even the smartest people around don't know everything :D
yes! I needed this technology for my ufo flying machine combined with the anti-gravity wheel! now I need to figure out my warp drive modules and time travel modules. oh ya and some weapons too for defense against space invaders.
So... if we make an arena with an electro magnetic floor we could be able to make aluminum boards to finally make a hover board 0_0
I saw the same experiment live there in the palais de la découverte it was awesome.
You should have shown their induction heater that's also used for forge.
I have not found one video this guy has done which was less than fascinating!
THIS is the reason that "STAND BACK! I'm going to try SCIENCE!" is a thing.
DUDE !! your videos are great. would you please make a video on the topic : the meaning of life. Eager to hear it from you. :)
It's noisy, surely expensive, even big, but also one of the coolest things you've showed us on your channel 👍
wow what a strong changing magnetic field even induced currents in the lamp , awesome setup :)
DO NOT ATTEMPT TO WATCH THIS VIDEO WITH HEADPHONES, Thanks.
Why not I'm doing it now!
it will hurt you depending of the volume of your headphones!!! XD
Dana Feldman Teens are more sensitive to high frequencies.
Kjetil Hvalstrand the engery from that went threw my headphones and I felt them lefatate off my ears
MrTor8 My volume is high and i am wearing headphones
It'd be a much better centerpiece of it didn't make me want to stab my ears out
use noise cancelling ear phones
levitating barbeque includes headphone inputs
My eardrums still hurt. Or should I say, *hertz*!
BURN!!!! (iPhone 7 joke)
Yeah😏
to me this is the best youtube video ever thanx!
Another excellent video!!
This would make a much better centerpiece if it wasn't vibrating at 900hz. That's a very irritating noise to have a conversation around.
Didn't he say it vibrates at the double of the frequency? Making it ring with a 1800Hz tone
@@crackedemerald4930 Yes it expands when the current goes through and heats it up, then contracts when the current stops, the rapid contraction and expansion create the sound. This happens twice per cycle, once on the positive half wave and again on the negative.
Only one problem with this barbecue, though: where do I find 800A?
You would need a transformer, If you have a 40A 220V supply you can use a transformer to make 12V 800 A, you would need a very heavy gauge wire though. The tougher part is to convert the 50/60Hz to 900Hz
For the frequency, you would need frequency dividers xD But the bigest problem would be the energy bill, I guess xD
whopping 8.8kwh/s at global average price it cost almost 1 dollar per second to run
you don't need 800A to levitate a ferromagnetic fork
(for example)
This video deserves more views
BEST VIDEO EVER MADE!!! Your AWESOME dood!!!
Korean BBQ on an electromagnetically inductive grill!
落ちる熊 just be careful with your watch?
dat eddy current
Best explained. College teaching Bachelors in Engineering should show this video to its students which will make them understand induction better. Nice work.
THIS IS SO FREAKIN AWESOME!!!!!!
I LOVE YOU VIDEOS!!!!!
900A 0.0
how do they keep the wires cool?
@@tripplefives1402 use oil-based coolant instead.. 😉
3:08 more like worst dinner center piece. You'll make all your guests go def! lol
To everyone questioning things about the material of the plate or why it’s warped etcetera ! I truly recommend that you visit the palais de la découverte in Paris. It’s a really fun place to visit and the people doing these demonstrations for the public everyday will be able to answer your questions. Don’t forget to come back and tell us. I used to live nearby but moved so a visit is not planned currently. Also make sure you also visit the cité des sciences et de l’industrie.
Le palais de la Découverte ! Great vidéo
We could probably make hoover boards with this or flying cars :-)
Nope. This has already been used for that type of tech. Unfortunately, the cost, danger, etc, etc, wasn't worth the effort. However, that's not to say a variation couldn't work. I have yet to see one. Surely our government's have craft that do more than levitate.
What's a "have craft"?
WAH!..... WWWWAAAAAAAHHHHHHHHHHHHHH :D
Man I love what you guys do.
Holy crap!!! That is the coolest thing EVER!!!!
Didn't telsa work on something similar ?? just wondering.
That's what I was thinking. Kinda similar about electric fields.
Yes, sirs. Tesla even mentioned Faraday's work, thanking him, on one his lectures or when he receives his awards.
That's a dinning table that will teach you not to put your elbows on it ;)
That was freaking awesome!!
Best one so far!!!
i have doubt what happens when we use a iron plate instead of aluminium ???? pls some one answer this question
+Adithya Venkaesh My guess it would be too heavy.
+Adithya Venkaesh Same thing would happen. The magnetic field would induce a current in the iron plate, which itself induces an opposing magnetic field to the external magnetic field, and thus the plate will levitate.
Juxtaroberto I really doubt it would levitate though. An iorn plate that big would weigh an awful lot. Needs testing
+Adithya Venkaesh Iron is a ferromagnetic material, unlike aluminium. So, apart from gravity, there will also be an additional force of attraction on the iron plate from the electromagnet, trying to pull it down. If the levitating force isn't strong enough, the iron plate will simply get stuck to the electromagnet, just as iron nails get stuck to a permanent magnet. On the other hand, aluminium will be much easier to levitate, as we do not have to worry about any attractive force. It is only gravity, that needs to be countered.
0:48 "Proffesor" ?!
+BryanLee7 That's exactly how a dyslexic person would spell. Interesting.
This guys makes teaching Intresting I love this! Want him as a teacher!
In my youth I went to the Navy and work in a navy foundry... we used foundry furnaces that used electric resistance to melt the metals. Very similar to what you're using in the video. Aluminum has very Unusual properties when it melts. Responsed to the magnet forces and would oscillate in the crucible. The higher the voltage the faster it would spin and follow the magnetic fields..
Someone watched this and thought about hover boards... in a few years they'll be multi billionaires.
Yeah but the problem is what's the power source of the board? If it's a battery i'm sure it wont last very long. I can only see wired hoverboards being capable but they're limited to the extension wire :(. The hoverboard would be easy to make if we discovered renewable energy
SClassFinalFlash or just really good batteries, graphene and whatever. Charge in 20 minutes, use for a few hours. For a first hoverboard that sounds reasonable.
SClassFinalFlash there's actually a hoverboard built which looks just like the one in back to the future, and it's awesome, you can check it out, its HUVr board
***** we would need infinite power for such measures
***** I thought you only have to either charge the board and have the pavement covered with a metal sheet (i dont know how thick)
wireless charging?
+masso172 well yes, but you need to make it so that it doesn't fry everything in its radius
+Hugo Lee I heard nikola tesla was working on something like that but I'm not a 100% sure.
jazzie man thaty's cool :O
+masso172 Wireless charging is pretty much here, but not by sending a current through the air because as Hugo points out you'd fry everything that came within that vicinity (if the current was large enough). No they are going to do it by converting the RF coming into a wifi port and then converting the energy to electrical energy. Seeing as you only use a few Ma to charge your phone it'll work just fine.
+masso172 Everything conductive will heat up like that plate, also notice how close it needs to be.
The best thing I watch today:)
You have a career/job that I'd love to have. Wonderful topics... Wonderful knowledge. Great videos. Thank you.
But you didn't even barbeque anything!
Where are you from? You have an american accent but you say aluminium, which is pretty rare for an american.
how are Americans supposed to say aluminium?
TheGuardian163 Most say "Alu-mi-num"
TheGuardian163 aluminum
And some say" Al-u-min-um"
This was amazing! :D
This is absolutely cool. Period.
it also show that wireless energy is possible
wifi is wireless energy, sun is wireless energy. No one god dam uses the sun we use OIL>
why don't you get electric shock??? ...the bulb was glowing in your hand...
+NABEEL NAJEEM Because there was no electricity moving above the coil, it was only the magnetic field. That lamp was an induction light. You did not get anything in this video if you're asking that tho :D
Thank you for the information.
I saw that as a kid at the Palais de la Découverte !
There's tons of good experiments that are shown there, and I think more than a few that would be good sources of inspiration for a video...
Try "le manège de coriolis" next time :)
I saw this thing in an old popular science mag from the 50's. The pictures show they had a model flying saucer and even showed them cooking eggs on the hovering plate.
WITCHCRAFT!!
LOL
SCIENCE!!!
Wireless energy. Wonder if this is similar to what Tesla was working on. Too bad Edison was a greedy dirt bag, and spent his time ruining Tesla's reputation/public image to make money...
Sooo awesome! Thanks for sharing this with youtube Veritasium :)
It feels so good when you understand what their talking about.
It is striking that Faraday's setups have been preserved as they were until today.
That is the coolest thing I've ever seen
This is the learning experience we need!!
ABSOLUTELY AMAZING !!!!!!!!
Thanks man, helped me as an example for my assignment.
Best thumbnail I've ever seen.
Awesome! In the literal sense!
Awesome Demo luv it.
That's so cool!
Michael Faraday made an amazing Discovery.
Wow. That's Frickin Awesome!
That's totally awesome one of the reasons I love science