Magnet making Current - Smarter Every Day 16

less than 1m read

·Nov 3, 2024

Hey, it's me, Destin. I'm in Baltimore. [Mascot blows raspberries] [Destin laughs] Thanks. [Music]

So let's say you want to make yourself smarter on electronics, but you're not, uh... You're not really swoofed on that kinda stuff. Oh, looky here, it's the National Electronics Museum. Why don't we go have a look?

John McCarty is here. He's a volunteer at the museum. We have a demonstration for you to show you the relation between current flow and magnetism. So there's a magnet right here, on this side of this tube. We have a coil of wire hooked up to a galvanometer, basically, that's measuring amps. It's set up for DC amps.

So when we twist this, the magnet's gonna fall through the coil and you'll get current flow here. So you can see the current spike. So here's the question: when we turn it the other way, are we going to get positive current or negative current? So that's the question.

So if you think it's gonna be positive - if the needle's gonna go that way, click here. If you think the needle's gonna go that way, click here, and afterwards we'll get Mr. McCarty to explain it, so... Click now. [Music]

Captioning in different languages welcome. Please contact Destin if you can help.

See Potala Palace, the Iconic Heart of Tibetan Buddhism | National Geographic

Financial Tips for Millennials: Part 2

View All

Jacksonian Democracy part 2

So we’ve been talking about the emergence of Jacksonian Democracy in the first half of the 19th century in the United States. We’ve been talking about how, in this time period, the vote was slowly extended to all white male citizens so that by the end of …

Giraffes on a Boat | Podcast | Overheard at National Geographic

It’s kind of a bit Jurassic Parkish, like you can hear her rustling through the bushes but you can’t see her. And that the brush was just so thick, and you know with inch-long acacia thorns or, you know, the other kind of hooked-shaped thorn, so it was a …

Inside the Kurdish Ground War on ISIS | Explorer

[Music] I began covering War for National Geographic in 2006, and I never got to Kurdistan during that part of the war. In fact, I really didn’t have any idea who the Kurds were back then. I happened to meet some wounded Kurdish soldiers in Baghdad, and I…

The Philosopher of Pleasure | EPICURUS

Pleasure is the first good. It is the beginning of every choice and every aversion. It is the absence of pain in the body and of troubles in the soul. Epicurus. In the third century BC on the Greek island of Samos, a man was born that would become the fo…

Building a Gym with Reusable Materials | Life Below Zero

♪ For me, I got to get my poop, so to speak, in a square. Tighten it up so that I’m super Sue again. But how do I do that? These are the two overflow tents, and I’m not gonna have people using them for quite a while. So I want to annex this one and make i…

My Favorite Watches From My Million Dollar Collection!

If they raised it, maybe they sold 50% of the business for a million bucks. I mean, if it’s worth 2 million, I’m throwing up. I went to the vault, and I got these puppies out—the hottest watch in the world. I was looking at it; oh, I was staring at this—t…

Magnet making Current - Smarter Every Day 16

More Articles