How Faraday Made Electricity with Magnets: Discovery of Induction, the Generator, & Magnetic Fields

[@robertgloverjr]

I apologize if I am clogging your comment sections with endless praise, but I am mesmerized by the way you combine biography and history with the fascinating discovery of electricity and beyond. You make these ghosts of the past become alive again and speak to us with eloquence and inspire us to honor their quests.

[@Kathy_Loves_Physics]

Never apologize for praise! Thank you. 😊

[@ronjon7942]

Couldn’t agree more! This historical background of a dry Physics textbook is, well, very refreshing.

[@recifebra3]

she's the best i've ever seen. if only we ever had teachers w/such passion and historical context, which I feel causes human connection and thus allows a historical personal connection w/what they might have been thinking and how amazing these historical figures really were.

[@zachreyhelmberger894]

I learn something new with every episode. It is clear that a great deal of research went into making these videos!!

[@sauravbhardwaj_]

This was brilliant

[@lambda4931]

I enjoy your videos. Thank you!

[@CharlesCarlsonC3]

This is the most complicated story you've done! All this is really cool!

[@Kathy_Loves_Physics]

Thanks, I think it's cool too. Nothing stranger than induction.

[@huangchao5164]

By this vedio i know where original idea of faraday generator come from! thanks! this series always are of high quality!

[@Kathy_Loves_Physics]

huang chao so glad you liked it. Cheers, Kathy

[@THEOGGUNSHOW]

A very inspiring story 👏. Thank you for sharing this.

[@Kathy_Loves_Physics]

Glad you liked it

[@surendrakverma555]

Excellent presentation. Thanks for sharing historical scientific developments. Great work 🙏🙏🙏🙏🙏🙏🙏🙏😀

[@deoraoamode9541]

Your explanation was very very very brilliant 💡 😎👍👍👍

[@genekrupa7]

Kathy, I don't think a Physics teacher could explain it any better!!!!! Your amazing!!!! :-) :-)

[@briansturges2658]

Wonderful videos. This is the reason KZbin was invented.

[@lesterloschky9161]

Perfectly put. I couldn't agree more!

[@ronjon7942]

Geez, Kathy. It’s been a while since I’ve canceled my NetFlix (and others) and have been able to binge watch a series! Fantastic, and I can’t wait to enjoy a Faraday-cup-of-coffee with you. One of these years. I hope you’re still prolific, although I’ve about a hundred more to go of your previous work :)

[@terryg4550]

My old school in London was called Faraday Secondary School, it is nice to be reminded of the brilliance of Faraday.

[@dunchall100]

Always love the videos, watching every episode, but I really like the picture behind you on this episode It looks amazing :). OK I had to edit. It changed at 7:57! I thought it was real.

[@daleeasternbrat816]

I work on industrial and marine generators. I was fascinated by electricity fron a verry early age. My parents had to buy me a book on the subject when I was 4 years old. B by y the time I was five I was experimenting with things and and trying all manner of ways to either electrocute myself or burn the house down. By a combination of luck and intuition I managed to avoid doing either . By the time I was 13 I had mastered engines , generators and control, with the help of an old Onan master service manual. Good Lord I wish these vids had been available to me at the time! They are a great way to learn electrical history and theory. They are presented in an outstanding way and are fun to watch even for one who makes a living doing work every day using the discoveries of these astounding people. Faraday and others created my profession!

[@ronjon7942]

This is a great story, Dale. I only wish….

[@earthelectricinc.154]

Kathy, excellent job on this video. So glad you mentioned François Arago. His copper rotating disk most definitely inspired Michael Faraday. These great patriarchs expounded on the discoveries of their predecessors.

[@sayedhassanphysics8491]

Thanks a lot for making this ❤️

[@Kathy_Loves_Physics]

Thanks for liking it.

[@Jamie-lw5sy]

Great explanation! You're a good storyteller

[@Kathy_Loves_Physics]

Glad you think so!

[@Jamie-lw5sy]

@@Kathy_Loves_Physics it's not a matter of whether I think or not. I was stating a fact.👍

[@banyanstudio]

His generator reminds me of an old hand cranked flashlight I had. Just squeeze it many times until the little incandescent bulb would glow.. Thank you for the great video. Have a nice day as well!

[@Kathy_Loves_Physics]

I had one of those!

[@banyanstudio]

@@Kathy_Loves_Physics I loved my hand powered flashlight until curiosity got the best of me - I ended up taking it apart just to see how it worked. And then I was left with nothing but pieces everywhere.😝

[@ronjon7942]

@@banyanstudio laf, story of my young life, as my Dad’s 67 Pontiac can attest.

[@GrandpappyJim]

Brilliant presentation. I've been watching all of them. I just have eto jump over that music jingle as it is like scratching fingernails on a chalkboard.

[@MissJean63]

I’m ashamed to admit I’ve never taken Physics. I really love your channel and your history stories make me want to take a Community College Physics class. I’m 58 but it’s never too late to learn.

[@Kathy_Loves_Physics]

Nothing to be ashamed of and I really do hope you take a physics class.

[@ronjon7942]

I’m 53, I feel the same. Granted, it’s been about 30 years since my Physics courses in college, but she’s actually inspired me to find my (dry) textbooks on ebay and look at them with a fresh set of eyes. What am I gonna do with this new perspective? Who cares. At worst, it’s a social study in forces I take for granted. At best, maybe I can help inspire at least one kid. At the very best, a cup of coffee with Kathy - what an amazing person, no?

[@ccamp3175]

Great idea, cousin Jean. I too embarked upon a Physics course, when I was in my 60's. The teacher at the local uni, a severe Romanian lady, was very skeptical about my ability, but finally allowed my in the class. She was actually kind of rude to me the first few days, but when I started showing up for tutoring with her, and finally aced the course, she was impressed. It was one of the most rewarding experiences of my ancient life.

[@LucasPinheiroV8]

Excellent!

[@MarvinMcDougle3]

You do such a good job of segueing into your next topic! Just found your channel and I'm entranced.

[@Matterhole]

Love your work 😮

[@abelquiron2653]

Very interesting. Thanks.

[@michaelchownyk5255]

I love your videos. You are really amazing And I thank you for making all these KZbin videos

[@jddavisism]

Nice video thanks Kathy

[@jwnagy]

Awesome series!

[@giftspiritlegacy]

What about the homopolar generator?

[@eddie2000ad]

Thank you so much!

[@sheilafussell176]

You are awesome!

[@bombadeer8231]

Two thumbs up 👍 👍

[@buldusmihai]

The video Editing skills are not top notch but the content is gold. Thanks a lot for making this! :)

[@Kathy_Loves_Physics]

Mihai Buldus sorry about the editing - have zero background in film (aside from watching) but am glad you liked the content.

[@djredrover]

1:01 ... I'm sorry I thought you were going on a whole different direction there LOL. "Faraday had a little 6-inch ..... Iron Ring".

[@milkessanegeriofficial]

great.

[@TNaizel]

Was the meter he used simply a compass needle that reacted to the current, or could he already measure the current intensity? BTW great videos I'm binge watching all of them!

[@Kathy_Loves_Physics]

TNaizel he just used a compass needle that reacted to the current. However, a compass needle could be used to measure the intensity of the current (although those tended to be calibrated and had the wires wrapped multiple times around the compass with compensation for the earth’s magnetic field). Glad u are liking the videos.

[@garyhaigh6074]

Yes, the mention of a 'meter' in the video had me confused.

[@radeonblue1816]

I was wondering how aragos disk work. Hopefully I found a video. Interesting as always.

[@Kathy_Loves_Physics]

pankaj kumarji tell me if you need more clarification on how the disk works

[@radeonblue1816]

@@Kathy_Loves_Physics I will experiment with it to understand it. Saw some videos. I think I require copper plate and magnet only. You already help a lot.

[@Kathy_Loves_Physics]

pankaj kumarji that should do it. Good luck.

[@ilidiomcbarros]

Hi Kathy, I have been reflecting for a considerable period about the nature of the intuition and their important role for our understanding of the reality and i need to be 100 % sure about one thing. 😊 Can you confirm me, please, if It's true that Michael Faraday envisioned the magnetic field during a dream that he had at a given moment of his life? Thanks and regards from Portugal.😉

[@Kathy_Loves_Physics]

Ilídio Barros I don’t think he had an actual dream more that he was thinking about it. He also had seen some patterns made by sand if music hits it at certain notes and it made him think of magnetic lines of force (the lines around magnets that can be seen with iron fillings) which might have inspired him.

[@ilidiomcbarros]

Hi Kathy, Very interesting! Thanks a lot. 😉

[@iomediastudio]

At 6:40 Faraday experiment shows magnetic electric motion -- so this should be useful in appliances and vehicles.

[@Bryan-dr5qy]

I have a question I hope you could help answering. I was reading about which conventions lead to the labelling of the electrons as negatively charged and of course it was because J.J. Thomson experimented with a Cathode Ray Tube and the directions the cathode ray were deflected by a magnet in a way only negatively charged particles would. But how were the +ve and -ve terminals labelled in the first place? I know Faraday coined the term cathode, anode, electrode but who and when was the decision made about which terminals were considered +ve or -ve considering ions weren't discovered until Faraday. This is a question that has been bugging me for a while. Hope you can help🙏.

[@Kathy_Loves_Physics]

The positive and negative were actually defined by Benjamin Franklin in the 1700s! And Benjamin defined it because he had brush rubbing against glass and he assumed that the brush with sweep away the charges and so he called the charge on the brush positive and the “lack of” charge left on the glass negative. By JJ Thompson’s time, positive and negative were baked into all the equipment so that once he figured out that the electrons were tiny and the ones that were moving and the source of electricity it was too late to go back in time. (Faraday defined the cathode as the terminal where the current came from and Anode as the terminal that the current went to. However, as they didn’t know about electrons he thought the current flowed from the positive to the negative, so in the battery the positive is the cathode and the negative is the anode. However, with the cathode ray tube you can tell which way the current is coming from so the cathode is the negative side. So sorry it is really confusing isn’t it??)

[@Bryan-dr5qy]

@@Kathy_Loves_Physics I can understand Franklin's thoughts on this but how does it apply to batteries? How did they know which electrode current flowed in and out of though? For example Volta's Voltaic Pile just mentioned using zinc and copper he didn't really specify which plate the current came in and out from at the time (now is hindsight we can go back and label it of course). So who did?

[@Kathy_Loves_Physics]

Bryan Leong that is a fascinating question. I am sure that somebody attached Volta’s pile to a Leyden jar and determined the charges on the plates by what would attract or repel silk rubbed on glass. But I don’t know who did it. Ampere? Davy? I don’t think Volta published after the battery so probably not him. Interesting...

[@ronjon7942]

@@Bryan-dr5qy This was a major stumbling block for me, from an engineering perspective, until I finally accepted that, generally, it doesn’t matter (again, from an engineering perspective). I just wish I’d have learned (accepted) this in my 20s instead of my 50s. Imagine my surprise (relief) that waves don’t have to be constrained to moving in perfect sine waves, and this is just a model we use to describe their motion and effect. The model is accurate for calculating, but does anyone really know how waves propagate for 13billion years to our measuring contraptions? Who cares, it seems to work. I wish I knew that I was able to accept this difference between how waves may act versus how we can measure them.

[@shlobodon]

this jawn be tight. big ups Kathy. ima tell sleep bout dis

[@Kathy_Loves_Physics]

Robert DeBaun thanks!

[@robertbatista50]

This explains why in another video someone said the Faraday’s law was really someone else’s formula. I love the history storytelling. I need to find a timeline for all these electrical discoveries.

[@rhoddryice5412]

They are uploaded in order. And this is number 20 as can be seen in the thumbnail and at 0:21

[@T.C.-st8uz]

And another supportive comment! - Good for your numbers 😉

[@Heightren]

It's wonderful to see at least Faraday was the great man we heard him to be

[@shawnmulberry774]

We need to get you more views...

[@Kathy_Loves_Physics]

Yes, please

[@fare2muddlin]

@@Kathy_Loves_Physics remember, cute cats equals success…Cc=Ytv^2.

[@viveviveka2651]

I am fascinated by the history and development of electricity. An aspect that I would like to understand better is how and why it was discovered and developed when and where it was discovered and developed. There were cultures around the world that went on for thousands of years without doing anything at all, or very very little. Why did it take off the way it did, beginning in mid-eighteenth-century Europe and America?

[@johndoggett4856]

It may have due to the Industrial Revolution being under way in Europe and America. So why did the Industrial Revolution start in Europe? The book Guns, Germs, and Steel by Jared Diamond addressed how Europe developed technological superiority over the rest of the world. It is complicated but worth investigating.

[@xsirfr1958]

The dc disc generator can be operated backwards as a motor, since F = qv x B, if you feed current from the center of disk to the periphery, with a contact near where the magnets are. Did Faraday try this? I guess you could cut slots in the disc to minimized Eddy currents.

[@goodmaro]

I would think that Faraday's experiment with the ring with two windings was not drawn to scale, or the compass needle's response to the current in the secondary winding would've been swamped by its proximity to the primary winding. I would guess he had longer wires leading from the secondary to his galvanometer.

[@djmurph444]

Hi, great videos, I'm wondering about the video after the faraday one, where your talking about Eddie currents in the copper, and how Casper, is the one the found out what wrong, or can you just tell me what needs to be done please Kathy?

[@Kathy_Loves_Physics]

djmurph444 im confused about what you are asking me, sorry. Could you clarify?

[@yg-hf2pv]

God bless you for hidden seceet

[@mariogagnon5987]

Good day Kathy, I love you channel and I have a question for you regarding the "meter" Faraday used to measure the current out of his spinning disk generator. Was there already some sort of galvanometer out there other than the usual "compas" needle for observing the presence of current in a wire?

[@ronjon7942]

A great question, I wonder the same.

[@Matterhole]

❤❤❤

[@kinshukbanerjee4587]

👏👏👏👏👏

[@susilgunaratne4267]

So the discovery of electricity [ AC ] generation by mechanical means, heart of our industries & public utility, owes to the Michael Faraday. Later modifications & inventions was made - single, two & three phase - within next 80 yrs led to our present day ubiquitous power system. Besides Faraday discovered electrical transformer as well.

[@ronjon7942]

Response to a comment: I’m 53, I feel the same. Granted, it’s been about 30 years since my Physics courses in college, but she’s actually inspired me to find my (dry) textbooks on ebay and look at them with a fresh set of eyes. What am I gonna do with this new perspective? Who cares. At worst, it’s a social study in forces I take for granted. At best, maybe I can help inspire at least one kid. At the very best, a cup of coffee with Kathy - what an amazing person, no?

[@Kathy_Loves_Physics]

Aww thanks. More knowledge is never a bad thing in my book and hopefully you can inspire someone else.

[@sonarbangla8711]

Faraday was not a qualified physicist, yet his concept of a field is central to physics and still it is central to quantum mechanics. Meditation is the source of knowledge. Socrates preached that everybody's brain contains all the knowledge, it is a matter of retrieving it.

[@stevehammond]

Very intersting and well presented but pleeeease drop the annoying 'electricity' signature chant

[@kentecklund]

Great videos! I'm especially interested because I'm disproving Einstein and loving The Electric Universe Theory.

[@magtovi]

"I'm disproving Einstein" Keep trying 🤣🤣🤣 Hundreds of the best, most brilliant and prepared minds (including Nobel laureates) have tried and failed.

[@goodmaro]

So because Faraday didn't know differential calculus, let alone vector calculus, we have this quaint terminology of lines of force being cut.

[@Kathy_Loves_Physics]

Yep

[@sekiroemo]

Meter preter

[@druid139]

Really interesting, but the speed jazz in the background is really distracting. Super bad choice. Otherwise, informative and entertaining. But yeah, drop the background music, please.

[@patrickbrady6697]

We should turn the day Friday into Faraday, in honor of Faraday. Who knows what "FRI" means anyways?

[@Kathy_Loves_Physics]

“Faraday I’m in love” 🎶 yep, works

[@varahamihiragopu6667]

Poor Charles Grey. He was perhaps the most transformative Prime Minister of England in the 19th century. Thirty years before Lincoln abolished slavery in the USA, it was Grey who abolished slavery in 1833, in the England and all English territories (except those held by the East India company, which in some ways was more powerful than England itself). In 1832 he implemented the Reform Act which basically abolished a number of "rotten boroughs" and established something close to proper democracy. Search for yourself and read about it. But among scientists, especially fans of electricity and Faraday, he's known as the PM to whom Faraday quipped about taxing electricity some day. Imagine if Abe Lincoln were only known as a friend of Joseph Henry, who invented the telegraph, or George Washington were only famous as a friend of Ben Franklin, who flew kites among clouds! Another tidbit is that Earl Grey tea is most likely named after him, though Wikipedia has a more complex explanation that it may be named after his son, the third Earl Grey

[@cjbartoz]

Take a 1831 Michael Faraday homopolar generator housed in a non magnetic environment, spin the magnet together with the conductor @ 50000rpm and look at the power output. Some people claim you can get 12 volt at 10000 amps from an 8 inch rotating neodymium disk magnet with ball bearings and liquid metal current collectors but I don't know if this is true/possible.

[@benquinneyiii7941]

As certain as taxes

[@EJAVAM07]

I like your program, but annoyed by the four "electricity" repetitions, twice. Could you do a short clip of the same singer(s) doing something about E & M instead? Maybe reduce the repetitions to two?

[@abbaskayani7403]

How scientists used to make battery and charge it in 1800?

[@benquinney2]

Saltwater

[@Yacine-e9p]

Magnet : le nom approprié à l'aiment

[@sergiosierra3380]

Tesla was the guy that patented all the discoveries from European scientist, with brilliant improvements of his own, but who really discovered the AC, the transformer, the electrical motor, even field theory was Faraday. History has treated poorly Mr. Michael Faraday.

[@pakosta05michal37]

Nhữg người thật là chất phát như lộc sẽ luôn gặp đc may mắn trong cs,Điển hình như nhà vk lộc đố,Bố mẹ vk lộc và các thành viên trong nhà thật là hiền lành ấm áp và tốt tính.

[@abbaskayani7403]

How scientists used to make battery and charge it in 1800?