How do Magnets & Magnetic Fields Work?

Have you ever wondered how magnets work? In this video, we'll dive into the fascinating world of magnetism and explore the fundamental principles behind it. We'll cover everything from magnetic fields and magnetic flux to flux density and compass deflection.
First, we'll discuss magnetic fields and how they create invisible force fields around magnets. We'll also explain how magnetic fields are produced by moving charges, such as electrons. Then, we'll explore magnetic flux, which is a measure of the number of magnetic field lines passing through a given area.
Next, we'll delve into flux density, which describes the strength of the magnetic field in a specific area. We'll show you how to calculate flux density using mathematical formulas and explain why it's essential to understand this concept in the study of magnetism.
We'll also explain how a compass works and demonstrate how it can detect the magnetic field of a magnet. This phenomenon is known as compass deflection and is a crucial tool for scientists studying magnetic fields.
Moving on, we'll introduce the concept of electromagnets, which are artificial magnets created by passing an electrical current through a coil of wire. We'll explain how electromagnets work and how they're used in everyday life, from MRI machines to electric motors.
Finally, we'll touch on the quantum nature of magnetism, which is a fascinating topic that explores the behavior of magnetic particles at the atomic and subatomic level. We'll discuss how magnetism arises from the spin of electrons and how this phenomenon can be harnessed for use in modern technology.
By the end of this video, you'll have a comprehensive understanding of the science of magnets and the fundamental principles behind their behavior.
More Lessons: www.MathAndScience.com
Twitter: / jasongibsonmath

[@paulatlin9067]

You are a walking.. talking encyclopedia of knowledge. Thanks for sharing

[@MathAndScience]

So nice of you!

[@RoseT-dz9hl]

Sir what type or kind of liquid u r using. I feel like show to my grandchildren what u show. I love magnets. Thanks i learn alot. God bless. Can u explain about refregerators some close good some dont.

[@WSmith_1984]

​​@@RoseT-dz9hliron fillings in a very light oil I'd imagine.

[@vincecox8376]

Let me share a few facts, I've been a Ham operator since 1959 as a general class operator I designed and built all my equipment (the TUBE days'). You have a good understanding of inductance!! I agree with all your findings. BUT!!! I want to expose something you can get into and it's going to blow your mind. JUST LIKE TESLA SAID look for things you can't see!! So, let me introduce you to what I refer to as the "B" field., I'm sure you know that there are three elements to any AC or Radio wave traversing space The oscilloscope only shows the two base elements, the positive and negative parts of any radio signal "BUTT!! The fact is it's the centerfield of a magnet that pushes the signal out whether it be AC current or a radio signal same thing!! Her's what I want you to learn: the centerfield of a magnet is by far the most powerful!! FACT! I refer to it as the "B" field, for a good reason it's much more complicated, Here's just a few facts: #1. If you tap the centerfield of a magnet (IE: the "B" Field) on any none Metalica item, it will lose weight. #2. If you tap the centerfield near a trickle of water, it will repel the water!! #3. If you vibrate the center field into a granite rock it will not only lose weight but also be very workable, what basically happens at the correct frequency the Quarts in the rock will reorganize. #4. The center field of a magnet is multi-dimensional. Once you start to see what's going on

[@jacintorodriguez679]

Jason, I am 69 years old man and I have never been so fascinated by science before watching your videos, now I am beginning to understand. You are actually reversing the dynamics of the universe by going from complex to simple. Thanks for offering your talent.

[@MathAndScience]

That is awesome!

[@leonhardtkristensen4093]

I am a 77 year young man and I aggree with you.

[@catalhuyuk7]

I’m a 65 yo woman and I concur 💯%!!!

[@andrewjustin256]

​@@leonhardtkristensen4093l love your spirit_ young man!!

[@GMT439]

@@MathAndScience Ma' G's N3T. Blue and Red are Opposite ends of the colour spectrum too. I hope you mentioned that. I'm not going to watch the video because I will learn nothing from it.

[@eric_james_music]

this is so much better than 10 min videos that don't go in depth. how else are you supposed to understand a complex concept like this?

[@MathAndScience]

Thank you and yes I agree!

[@mrwebber35]

1hr and 42 minutes and not once did Professor Proton mention that the North Pole is positive and South Pole is negative. Electrons are negative and are attracted to positively charged metals and the reverse is the hole flow which is the opposite and attracted to the negatively charged metals. Take away an election creates a hole. Magnetic fields mimic electron flow which is how inductive transformers and motors work. This also explains how you can charge your cell phone without plugging it in or bladeless fans can blow air around. Interesting how the compass is attracted to Earth's North Pole but attracted to the magnet's "S" Pole. That means Neil DeGrasse Tyson is right, Earth's North Pole is actually the South Pole. Earth's North Pole is actually True North Pole not a magnetic North Pole like Professor Proton called it. Technically it is the "magnetic" South Pole. Then there's the "geographic North Pole which is the axis of which the Earth spins. Welcome to my world. Sorry Professor, I had to. Oh great, Faraday's Left Hand rule is not referring to the right hand professor. The right hand rule is Fleming's pertaining to thrust and the middle finger is current flow and the thumb is mechanical direction of motion.. Since you say the thumb is the current flow then it is the left hand rule of Faraday not Fleming. Fleming is referring to a mechanical movement which can reverse the lines of flux like your picture. That means the lines of flux in your drawing are circulating the wrong direction if you mean current flow. Now you say your thumb is hole flow so your drawing is correct. Congrats. Never the less, it's still doesn't negate the rule is Faraday's Left Hand Rule for current flow, not a right hand rule when the thumb is the current flow reference. Oh too bad, you were so close.

[@catalhuyuk7]

If all teachers were as good as you this world would be a better and much different place.

[@husseinahmed741]

You are "the" genius tutor. No others could be that perfect. I hope we have you in other subjects

[@davidjones6288]

Sir, you are utterly gifted when it comes to teaching. Thank you so much for taking the time to teach us without leaving gaps in the flow of information, which so often fractures the uptake of information.

[@user-te6nj8fv7e]

Sir, you are utterly gifted when it comes to teaching. Thank you so much for taking the time to teach us without leaving gaps in the flow of information, which so often fractures the uptake of information.

[@vincecox8376]

Please get tuned into facts, 1. anti gravity is a product of the center field of a magnet. 2. the center of a magnet when vibrated will repel water 3. If you vibrate granite rock with the center field of a magnet at the correct frequency it will turn like butter. that's just the beginning it will play a Hugh part of our country's future. The anti gravity is only applicable to none iron type material such as glass or plastic. If you have a bar magnet simply tap the center near a trickle of water and watch the water move out of the way. Tap the center field on any none metalic surface and watch it loose weight. You can not use a sign wave type vibration it must be saw tooth . A sign wave signal contains the centerfield, that's what pushes AC and radio signals around the world. A sign wave has three elements on an oscilloscope you only see the two , On a scope you see the positive cycle and the negative cycle you never see the most significant part of the cycle and that is the center field that produces the energy to push the energy forward!!! There is allot to be learned about the magnetic center field .. Please help spred the news ..

[@MarkusCommenter]

I'm an extreme biology nerd that had trouble during the physics course. I just wanted to say thanks for making this. It was very interesting and helped me get a better grade. I can still proudly say that I haven't failed any classes thanks to you.

[@Idkwhattonamess]

You're a good man

[@MrPaulhunter]

I’m 72 rears of age and I loved your presentation. Yes I made it to the end and I’m going to watch it all over again. Thanks for being such an enthusiastic teacher. It’s cleared up some of my own questions and needless to say brought many more questions I need to answer to the forefront… isn’t science wonderful😄😄😄

[@anthonygregg862]

absolutely superb lesson sir. You explain things so well and understandable. I am so much more interested in science and its all down to you.

[@MathAndScience]

So nice of you! Thank you!

[@vincecox8376]

Let me share a few facts, I've been a Ham operator since 1959 as a general class operator I designed and built all my equipment (the TUBE days'). You have a good understanding of inductance!! I agree with all your findings. BUT!!! I want to expose something you can get into and it's going to blow your mind. JUST LIKE TESLA SAID look for things you can't see!! So, let me introduce you to what I refer to as the "B" field., I'm sure you know that there are three elements to any AC or Radio wave traversing space The oscilloscope only shows the two base elements, the positive and negative parts of any radio signal "BUTT!! The fact is it's the centerfield of a magnet that pushes the signal out whether it be AC current or a radio signal same thing!! Her's what I want you to learn: the centerfield of a magnet is by far the most powerful!! FACT! I refer to it as the "B" field, for a good reason it's much more complicated, Here's just a few facts: #1. If you tap the centerfield of a magnet (IE: the "B" Field) on any none Metalica item, it will lose weight. #2. If you tap the centerfield near a trickle of water, it will repel the water!! #3. If you vibrate the center field into a granite rock it will not only lose weight but also be very workable, what basically happens at the correct frequency the Quarts in the rock will reorganize. #4. The center field of a magnet is multi-dimensional. Once you start to see what's going on

[@rodknocking351]

Outstanding explanation of magnetism and how electrical current and coils create magnetism. I wish struggling physics and EE101 students everywhere knew this video was out there available on youtube. This is a better and much more understandable presentation of the subject than any professor I ever had. Nice tie-in with electron spin and magnetism too. When I went through college I could work the math but never really understood what it represented. After watching this video it finally all makes sense..

[@TrapperAaron]

This is definitely an intro type class. I graduated many moons ago but these basic concepts were covered in high-school. I would be outraged if I had to pay for information that anyone w a G.E.D. knows.

[@vincecox8376]

Let me share a few facts, I've been a Ham operator since 1959 as a general class operator I designed and built all my equipment (the TUBE days'). You have a good understanding of inductance!! I agree with all your findings. BUT!!! I want to expose something you can get into and it's going to blow your mind. JUST LIKE TESLA SAID look for things you can't see!! So, let me introduce you to what I refer to as the "B" field., I'm sure you know that there are three elements to any AC or Radio wave traversing space The oscilloscope only shows the two base elements, the positive and negative parts of any radio signal "BUTT!! The fact is it's the centerfield of a magnet that pushes the signal out whether it be AC current or a radio signal same thing!! Her's what I want you to learn: the centerfield of a magnet is by far the most powerful!! FACT! I refer to it as the "B" field, for a good reason it's much more complicated, Here's just a few facts: #1. If you tap the centerfield of a magnet (IE: the "B" Field) on any none Metalica item, it will lose weight. #2. If you tap the centerfield near a trickle of water, it will repel the water!! #3. If you vibrate the center field into a granite rock it will not only lose weight but also be very workable, what basically happens at the correct frequency the Quarts in the rock will reorganize. #4. The center field of a magnet is multi-dimensional. Once you start to see what's going on

[@PaulCTownsend]

I will never look at a solenoid the same after listening to you Thanks for the great info.

[@spacetimemalleable7718]

One of the BEST explanations of magnets. & magnetism And it's humbling that we don't know everything... yet. Why from high to low energy? Why do electrons have a spin attribute? More research needed. Hopefully one day, there will be an explanation - Noble physics prizes are waiting.

[@MathAndScience]

Yes absolutely!

[@mewsicman9541]

I've been waiting for this! Hoping for more lessons about electromagnetism

[@MathAndScience]

Awesome to hear thank you.

[@billsavimaki900]

​@@MathAndScienceis ¹¹.😮😢🎉😂c😅😅u6t31 45:38 45:38

[@sibalogh]

Jason, I still believe you're the best to explain things despite no one seemingly can perfectly explain to me how permanent magnets work on the subatomic level. The best I could comprehend about PMs is that once you harden carbon steel it becomes magnetic due to the carbon atoms (more the better) locked in its molecular structure that retains magnetism even after removing the magnetic field that created it (hence the reason screws stick to the tip of screwdrivers). This is only valid for carbon steel, not a proper PM magnet, although this concept might apply to them the same way.

[@KerbalSpacey]

yeah I clicked this hoping for a deeper level of understanding than we already have but we are still stuck in the mystery of why particles even have a north and south pole to begin with before even getting into the whole itinerant ferromagnetism debacle lol i guess asking "why?" is the same as asking why there is anything rather than nothing... will always be out of our scope.

[@andrewclarke6916]

Great lesson. Good blend of theory and practical. Please make more videos like this.

[@MathAndScience]

Thanks, will do!

[@tresajessygeorge210]

THANK YOU... SIR...!!! You have done a great teaching...to connect all the basics we know about this PRAPANCHAM... and took us far beyond...!!! IT IS FUN AND WISDOM...!!! ENJOYED VERY WELL...!!! THANKS AGAIN...!!!

[@petMonster28]

This guy is amazing. I've learned so much from him over the years. Thank you, Math and Science.

[@Hoekstes]

I like how you invited energy to the party. That’s the thing that always make magnets seem like magic things with endless energy.

[@alfredoillescas4353]

Excellent explanation! when I was a student I had to read so many bookss and cost me a lot of time to have a real picture of the physical phenomena. Now Jason, in less than an hour, explains everything so clearly!!

[@user-xe5nl7dt4q]

The teacher keeps the subject, students flirt themselves

[@terrybull3798]

Excellent presentation. I think it is worth considering at 1:7:04 that, as your arrows show, the external field of the solenoid does not cancel but the additive effect is diminished by the reducing flux density, and thus tends to zero in the ideal solenoid. If the external field did cancel every case would behave as ideal.

[@daviddabeegukabassima8232]

So clear explanations. As an EE it is like music to my ears. It refreshes the concepts in a limpid way Thank you and God bless!

[@stuzman52]

Very well done! As you mentioned, we truly don’t know what’s happening at the quantum level, but models help our feeble minds to come up with calculations to describe our universe. I believe that magnetic field lines do not exist. The magnetic field is continuous throughout, dissipating as it extends outward. In other words, with the iron filings, one would believe that in between the lines, there is no field. When actually, each iron filing has become a magnet repelling another iron filing in its next concentric circle. Also, when looking at an electron’s magnetic field, you can use the left hand rule to show the direction of the magnetic field. Again, great discussion Jason of this complicated topic. 👍

[@micahjoshua8827]

Amazing video sir. Thank you for illustrating everything so clearly. I'm very interested in the theoretical physics of Electro Gravitics and Over Unity energy machines. I'd love to see you do work on those things.

[@alerum3473]

Cool dude! This is the Science teacher everyone needs! ☺️👌

[@awoyemivictora]

One of the best science videos so far. I know it's not easy to create this kind of video and the time. Thanks so much sir.

[@AVOWIRENEWS]

Magnets and magnetic fields are such fascinating topics! It's great to see content exploring how magnets interact with the world around us. The way magnets can attract or repel each other and how they influence objects without physical contact is really intriguing. Plus, the concept of magnetic fields extends to so many areas, from compass navigation to data storage in computers. It's amazing to think about the invisible forces at play!

[@leeslevin7602]

You sir, are absolutely brilliant. Thank you. I'm an electrical engineer, this is by far the best lesson I've ever come across. 👏👏👏

[@RamiK101]

Great demonstrations and explanations! Really appreciate your time and efforts. Thank you.

[@MathAndScience]

You're very welcome!

[@zezebeavogui6694]

It's so well explained that I understood every single aspects. Thank you so much. I love it. Subscribed.

[@User-74891]

Thank you for very good demonstrative experiments and explanation of behaviour of magnets.

[@justinwilliam5693]

This is better than my physics w/ calculus 2 class and its free! Thank you sir

[@vythinathanduraiswamy3430]

Excellent explanation of magnetism and the idea of mathematical models that may or may not fully explain what really goes on. Very enlightening. A huge thanks.

[@raydelaforce8149]

I really like the way you explain these concepts. I can just see Michael faraday doing the same things amazing children. They didn't need the math, but the evidence is locked into their minds when they get in the physic of electricty. Thank you, I enjoyed it.

[@Ckillen2422]

I've been fascinated by magnetism lately. Because it already is an invisible force that can easily explain why the Earth's magnetism could be the source that's turning the constellations through an invisible axis that makes a vortex which creates our gravity. Especially when you see how quantum locking works. It's just fascinating stuff.

[@anoopchempakasseril8417]

Excellent lesson. I was planning to make speakers and before that I wanted to learn magnets thoroughly and I am so glad that I found this video. Keep up the good work

[@MathAndScience]

Glad it was helpful!

[@m.syassin5774]

A very interesting and useful lecture. Thank you very much.

[@nickrowe9221]

wonderful. recommend it to everyone.

[@frankroper3274]

Great class for anyone interested in electricity such as myself!

[@inarisound]

THANK YOU SO MUCH!!!! It was really awesome, I've learned a lot! btw love these 10-minute format videos 😋

[@user-jd3xg3lo1y]

you my man--are great---ty -i,m 77 and do wish i had you as a teacher all the way through--you are very understandable--thanks again

[@sidhu.australia]

Thank you very much for your great information about the magnetic field n magnets. You are a great teacher to explain things easy n simple way.

[@trailertrashed6390]

Bravo.... Thanks for the very informative lesson. Science is awesome, even more so when its easily learned. Well done...

[@dougloggie2880]

awesome... you've ignited my curiosity in science... As you explained the rotation of electrons, my thoughts go to whole big picture of why matter rotates around the centre points gravitational objects in the universe...

[@DeteacherTeacha]

Great explanation...Enjoyed It..A Refresher For Me...

[@jedidaddyissues4128]

Thank you so much for this video! I really feel like I have a better understanding of magnetism, and you have inspired me to do further research!

[@road_warrior_1]

Now get the most expensive rare earth magnets, bolt opposing sides together, weigh them and find an equal weight. now drop them from a few stories and see which one lands first. Love the channel btw cheers 🥂☺️

[@James-yp5dn]

That was an awesome explanation 👍👍 thank you for taking your time to explain a difficult question about how magnets/magnetism work .

[@tsmith4343]

The last 10 minutes really explained the attractive and repulsive properties of magnets. Keep up the great work!!!!

[@MathAndScience]

Glad you liked it!

[@user-du7jx8ex1e]

Thank you very much. Amazing presentation.

[@wilkyclergeot9416]

You're so amazing teacher everyone would love that just the way you described it incredible teacher!!!

[@MathAndScience]

Wow, thank you!

[@saugeyes]

Great lesson! I would love to see your Iron fillings experiment on repelling and attracting magnets. Am I correct in assuming 2 opposite magnets when attracted together form one larger magnet?

[@MathAndScience]

Yes exactly when they attract everything is lined up in the same way so they form 1 larger magnet!

[@user-qs6hc8xv4y]

TQ SO MUCH SIR, FOR DETAILED INFORMATION OF BASICS

[@musicoscope]

you are a genius! you live science and have the power to magnetize with you anybody that hears your videos, they are so profound and thorough!! thank you very much!!!

[@charliejohnston1978]

This is a very good demonstration of how magnetic lines couple together to form closed loops of a magnetic field in the air or in space. Once the lines are formed/coupled together and everything stabilizes, the lines are coupled together without moving from pole to pole actually. And that is why we saw steel filings being coupled and attracted to both poles simultaneously. You did a very nice good of explaining why the fields are generated within each atomic structure and magnetic domain. The angular rotation of each atom's electrons is random, until the magnetic field is introduced to see its region of magnetic influence. Thank you for helping young people increase their knowledge of physics. QED

[@digbysirchickentf2315]

The field is continous there are no actual lines, that is only a concept to map the strength. The filings form lines within the field because of their long thin shape. I thing the video host maybe confused. I didnt watch the whole video.

[@fsiserir]

Thank you for this helpful lesson.

[@user-ds9hg7bf2r]

Perfect explanation, interesting and clear. Thanks a lot!

[@AR-tb9hq]

what an excellent lecture, thank you

[@mbahcarrier1629]

How Do Magnets and Magnetic Fields Work? Good question. I like this video because it provides a lot of knowledge. Always success "Math....."....Pekalongan, Central Java, Indonesia On

[@jham7894]

Thank you, very enlightening!

[@rudyhabib2]

i wish i had you as my science teacher! great video. thanks.

[@Eileen_Yulick]

Thank you so much for this you’re a great teacher.

[@lamperya]

I am a Porter but I love science talk , I allow myself to give students an advice to review what Richard Feynman said in this part from 1:40:28 to 1:41:20.

[@ursschmied5309]

yeah "mesmerizing" ist most certainly the word! Terrific doing, Mr. Jason! :) cheers!

[@glenmartin2437]

Thank you. Watched your video several times. Would have been good to have it when I was slogging through engineering physics. I and my fellow students were buried in calculus, not having physical models for the phenomena we studied. Thanks.

[@MathAndScience]

Glad it helped!

[@albertomontoya4316]

Another Excellent lesson , Jason.

[@leonhardtkristensen4093]

I think you explaned it very well but I am even more satisfyed with that you admitted that it is probably just the functioning of it you explaned and not the total truth. I am especially happy with that you explaned magnetic attraction in a way that is actually a pushing effect. It is just like that vaccuum doesn't suck. It is the air aroud that pushes things into the vacuum.

[@michellalonde137]

Thanks ,, Please make more videos like this...I learn a lot today ,,

[@mirzaalim2439]

Super explanation. Thanks

[@jaybingham3711]

Excellent. More importantly, those that want so badly to have firm, definitive answers for every baseline why...why? Show me a universe where all the minutia is known and I'll show you a place where it would be miserable to live. The thing that is important/relevant for us is pragmatism. We observe the tendencies of how the universe gets on with its business and we embrace that as our way forward. Science doesn't need absolute, fully sussed out truths to go about its business. In fact, science expressly works only under a rubric of tentative truths. That's unknown by and/or lost on many.

[@resignurdrnk7535]

amazing visual presentations. super fun!

[@MathAndScience]

Thanks so much!

[@nagasundaryerramilli3867]

Excellent explanation. Your way of explaining is very good.

[@user-qs3mh4pp3b]

Briliant lecture.

[@saulwarren9611]

just what I needed, awesome thank you.

[@muhammadhussainsarhandi9928]

Excellent Sir, lots of respect and love for you,

[@MathAndScience]

Many many thanks!

[@o0o-jd-o0o95]

Whenever you're handling neodymium magnets take care never to let them slam together because they will break easily. they're quite brittle. regular magnets probably could break as well but definitely neodymium because they're a bit stronger and they will probably slam together a lot harder

[@ismaelismael9080]

Very satisfying video, thank you dear. We hope to see more videos like this one.

[@naftalibendavid]

Fantastic work. Amazing. Thanks so much.

[@peterwilcox1520]

This is real magic🎉❤

[@DownhillAllTheWay]

From 1:17:40 to 1:26:35 is a talk about how magnetic fields exist due to their interaction with electrons (which are components of atoms). Does this mean that if I took two bar magnets into intergalactic space, their magnetic attraction or repulsion would be greatly reduced because the number of atoms, and consequently electrons per cm^3 is greatly reduced?

[@DuduGPT]

Explained very well.

[@nickjohnson410]

This is amazing. Thank You!

[@h7opolo]

most excellent presentation of this topic. subbed. 20:37 right on

[@mudasirbelail7993]

The best video I never seen before, thank you for sharing

[@eagle43257]

The most honest scientific explanation

[@brentchadwell8101]

The best teacher!

[@eduardmeyer1]

Thank you, sir for you dedication 🎩

[@mohamadfazli5575]

That was impressive explanation thanks for your time and Passion and patience,,you are suburb.

[@allenpike5473]

Excellent Sir!! Im sorry to only hear this at 77 yrs of age!! Pse continue!!

[@ottomendez2404]

What a great video!! Thanks!!!!

[@alangamer2017]

Nice lesson , hoping for some lessons about optics

[@victorcervantes3822]

Wow nice explanation thank's sir

[@deanparker5548]

Great video, Thank You!

[@jamesjohn2537]

Nice lessons and more helpful and deep in content

[@MathAndScience]

Glad you think so!

[@akikotsukamoto1334]

So interesting to watch!

[@laynelommen9460]

Im down with the sickness. Great video.

[@talashpeygir2621]

How can I appreciate your teaching other than appreciation

[@humbledb4jesus]

i've come to understand it better learning about qubits and quantum operators... at each point in space, we have a field of operators that affect the wave function of a object... if you have an object at point A with initial conditions X: the velocity operator will define its motion the electromagnetic operator will define the behaviours of electric charge the gravity operator will define it's path through timespace when you look at an object, you are applying a 'positional' operator on the object's waveform to find out where it is... applying the operator collapses the wave form... the conditions of operation are inherent in the fields not the object...it only has finite initial conditions regardless of field encountered...

[@Marie-Sophie_Saint-Germain]

@41:30 attracted/repelled that's the system using in door bell, when you push the button it send a current in the magnet which will be attracted to the cloche and released and again ...

[@surgingcircuits6955]

This answered so many qiuestions I have had. Why did you wait so long to share this info? :D

[@fotistsoukalas6916]

Very nice presentation. Congrats.