yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

World's First Electric Generator


3m read
·Nov 10, 2024

[Applause] I have a pipe. Yeah, do you want to hold it? Do you know what it's made of? Metal. Is it brass? Copper? Coer? Is copper magnetic? No? Uh-oh. I'm going to go. No, I didn't think it was. Go, yes! I'm going to go. Yes! Well, why don't we check? This is a magnet and I'd like you to use it to test whether the copper is magnetic. No, I want you to be 100% sure. What do you think? No, it's not magnetic. I said so.

Okay, is there anything in there? No. What do you see in there? That's nothing. So why don't we drop something through it? Just make sure it's empty, right? Okay, this is not a magnet. So this isn't a magnet, but let's see what happens when we drop it. [Music] That was a dull experiment, wasn't it? Yeah. Yeah. Okay, so what's going to happen if we drop this magnet down the pipe?

Going to pull free? Pull? Let's do it. 3, 2, 1! That was weird. That's well cool! Do it longer. What's slowing the magnet down? It's got to be magnetic poles or something. I don't know. North, south? TR to do with the polarity of the North and the South Poles, but it doesn't stick. But then it's not magnetic, so it shouldn't do anything, right?

You guys are there. That is slightly magnetic on the inside somehow. It's going to be magnetic inside, isn't it? Or [Laughter]? Something. Does it like—it kind of tilts? I think it's the powers of the Universe. I don't know. I don't know why it's doing it.

Well, this is what's exciting: only a few blocks from here was the lab of a guy called Faraday. In October 1831, he built the world's first electric generator here. A magnet which you push and pull in and out of a coil generates electric current. So that's the actual… yeah, world's first electric generator.

And there's a permanent magnet in the middle. That's a permanent magnet, yeah. It was Faraday who realized that it's a changing magnetic field that actually can generate electric current. So as the magnet is falling through the pipe, it's creating a changing magnetic field that generates little electric currents—so-called Eddy currents—in the pipe, and they create an opposing magnetic force on the magnet, slowing it down.

So it actually turns the pipe into an electromagnet. I see, which pushes the magnet up. And this is what's known as electromagnetic induction. So it causes my LED to light up there. But it's important that you move the magnet quickly because if you move it too slowly, the magnetic field is not changing fast enough to generate enough voltage to light this LED.

This is actually the way all electricity is generated. Is it? Yeah, you move a magnet near a conductor and it creates electric current. But where is this electrical energy coming from? You can't get energy for nothing.

Well, Faraday realized that there must be a force pushing back on the magnet. It's the same force that slows this magnet down as it falls through the pipe. So there's actually energy being converted from gravitational potential energy into electrical energy and eventually to heat.

So this pipe is warming up by taking some of the energy out of the falling magnet. Is that any good or what? Oh, it's very good! This way and these currents coming around this way will induce a magnetic field pushing in the opposite direction. We took a gra—and me out, you would find that it's about 12 and then…

More Articles

View All
For Children With Clubfoot, Treatment Can Be Life Changing | Short Film Showcase
Now, nom Santos Kumara my Sonia Gandhi camera down. Watchmen Sergio de Rarawa the Armada over bodega. Rebecca’s terrific asana trauma para me repair yerba. Mr. Murata or Tamia Scylla’s NYADA vada pav watch for do far para trás. Elohim as additional Shahad…
Two Classes of Bitcoin? | Kitco NEWS
Joining me now is serial entrepreneur, Shark Tank star, and chairman of O shares ETFs, the one and only Kevin O’Leary, Mr. Wonderful. Wonderful to have you back with us! Great to be here. Thank you so much! All right, so Kevin, Jamie Dimon is saying tha…
How Ozempic is Currently Breaking the Stock Market (and Denmark’s Economy)
If you look at Europe’s largest companies, you get some familiar names: Accenture, Hermes, L’Oreal, semiconductor manufacturer ASML, and the luxury goods behemoth that is LVMH. But another name that is very quickly charged its way to the top of the list i…
See How Life Has Changed in the Middle East Over 58 Years | Short Film Showcase
That’s right across the Lebanese Syrian border. I stopped, pulled out my camera because I had resolved that the entire time I was in the Middle East, that I was going to keep a detailed photographic record of all my landscapes and have a real collection o…
Parallel structure | Syntax | Khan Academy
Hello grammarians. Hello Rosie. Hello Paige. Hi David. Hi David. Today all three of us are going to be talking about parallel structure. And I’ve always had trouble spelling the word “parallel,” but Rosie pointed out something just before we started reco…
Pen Pal Experiment: Two Women Swap the Data of Their Daily Lives | Short Film Showcase
[Music] I’m Georgia. I am Italian, but I live in New York. I’m Stephanie. I was born in Denver, Colorado, but I’ve lived in London for the past 13 years. We met each other in person twice. When in September 2014, we decided to collaborate on a year-lon…