Magnetism: Crash Course Physics #32

You’re probably familiar with the basics of magnets already: They have a north pole and a south pole. Two of the same pole will repel each other, while opposites attract. Only certain materials, especially those that contain iron, can be magnets. And there’s a magnetic field around Earth, which is why you can use a compass to figure out which way is north. In this episode of Crash Course Physics, Shini takes us into the world of magnetism!
--
Produced in collaboration with PBS Digital Studios: / pbsdigitalstudios
--
Want to find Crash Course elsewhere on the internet?
Facebook - / youtubecrashc. .
Twitter - / thecrashcourse
Tumblr - / thecrashcourse
Support CrashCourse on Patreon: / crashcourse
CC Kids: / crashcoursekids

[@crashcourse]

We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/3TW06aP

[@tkdyo]

I remember taking physics 2 in college, it was hilarious watching everyone use these right hand rules at their desks during tests staring so hard at the paper while doing these hand gestures. Of course I was too.

[@m.c.doublestudios]

got a physics 2 exam tmmrw and I expect much of the same haha

[@brigham1465]

me on my exam next week

[@Cagmito125sportsbikespares]

i remember school too , but they taught me how to sit straight , nothing about physics i guess mine was a special school .

[@dxstiny.shawano]

For people who are struggling to understand this video because of how fast it is, I use this to study for test and I get A's every time from it so I can help you break some things down and how to understand it better: 1. If things are listed it's probably a key point and should be remembered easily. 2. Pause the video in between ideas to process what she had went over, repeat to yourself key ideas 3. When they show a diagram or chart of some sort, try to study it and go over the things they are talking about in it. 4. Listen to her as if she is telling a story, if makes it more interesting and easier 5. If she talks too fast in an area, reverse it and pause every time you need to remember what she said. 6. If you were daydreaming for a second, reverse and see what she said, it may just be important. 7. If your studying for something I would advise you to rewatch the video 1 or 2 times to get in stuck in your head.

[@augustus7055]

Its 4am. I have an exam tomorrow and I am crying into a bag of chips cause this just helped me understand all I've been learning all semester. Thank you

[@ThePositiveTarot]

It's called Crash Course for a reason. The information is crashed on you. Why are you complaining about her talking speed when it's actually the point?

[@jorgea.garzav4650]

no matter what, always is there somebody who complains =\

[@themaverickblackbelt8054]

IMO this is her best video. Clear explanation, spoken clearly and not too fast or slow. So good even I understood... eventually. Great job!

[@Mattonaise]

If you want to get deeper into the physics, the magnetic field is actually the electric field within another frame of reference, according to the rules of special relativity. Einstein's theory fundamentally linked the two, and electricity and magnetism became one and the same: electromagnetism.

[@CrimeMinister1]

People were giving me weird looks in the library. One man asked me what I was doing, I simply explained physics homework. The puzzled look he gave me was priceless

[@kacheee3246]

POV: you're watching this because of corona.... your teacher sent this to you with worksheets you're procrastinating, instead of watching the video ,you're reading the comments the comments aren't funny you're bored now.

[@josiahvalery5479]

facts

[@cxkios]

yass

[@TehGoldenBukkit]

They do be spitting Fax doe

[@aA-te3wz]

Yeah, this was recommended by my teacher

[@penisdubs]

nah my teacher recommended a video that looks like it was made in the 1990's. Im here because this ones better than that video

[@hyperionsama]

I haven't watched crash course in a long time, this is the first time I've seen this woman, and she's great :) time to binge watch crash course haha

[@ayyitsMLE]

These crash course videos are lining up perfectly with the AP Physics 2 topics......too perfectly

[@vikusik501]

Emily Tang lol that's cause they are following the curriculum. It says in the series description. They're falling back for my class though. The electrostatics were going good, but now the videos are coming out too slow to help me through my class...

[@g.v.3493]

Back 50 years ago on February 14, my physics prof. told us the Valentine day story of a couple called Bev and Bil (the magnetic forces of charge and current). I thought it was pretty stupid at the time, but 50 years later I still remember it.

[@stephendean2896]

There is something about your voice that is hypnotic cause I keep listening after I find out the information I was looking for, great job as always

[@evanhebner2712]

This couldn't have come at a better time. I have an AP Physics 2 test tomorrow on this.

[@meatychunkz8875]

Evan Hebner what's ap physics?

[@meatychunkz8875]

Evan Hebner I'm just wondering

[@evanhebner2712]

James Henderson Advanced Placement. It's a US version of hard college-like classes in high school. Sort of like IB classes.

[@stumblingdeth83]

good luck mate

[@drascula3806]

Evan Hebner Same man.

[@dorotheufarias]

Crash Course Mathematics, please

[@hypercoder6577]

Yes please!

[@EricRobertPike]

Dorotheu Ximenes de Farias specifically calculus AB

[@BoB-st7jo]

shut up and take my money

[@Doc_Loc]

BoB ok :D

[@nathanezra1]

Omg yes Please please pleaaase!!!!!

[@MrThepatrickshow]

Nobody who wasn't already an expert in this field could watch this video and make any sense of it.

[@nym1001]

so in other words magnets how do they work?

[@oldcowbb]

basically what the whole series is

[@EvilNeonETC]

Patrick Melody I dont necessarily understand the variables specifically, but I understood this concept back in the 4th grade when we did electronic wiring experiments.

[@bloodfiredrake7259]

i'm not an expert and infact am still in highschool(think thats what americans call it) and i understood this perfectly

[@annyongpanda]

This is a physics course. Physics is generally a high school level course in the US, some countries might be different. You don't have to be an expert to understand this, you just have to know some physics (I.E. watched the other episodes)-- and have a high school level education.

[@BigBackdBrawler]

If she was my teacher for physics in high school I'd have a PhD in quantum physics now

[@ariannanatale5241]

1 - What was professor Oersted using in one of his lecture? 2- What did he notice in one of the instruments he was using? 3 - What conclusions did professor Oersted's discovery bring to, and when did that lecture take place? 4 - How does magnetism help human being as far as Earth's magnetic field? 5 - What are the basics of magnetism according to the video? 6 - Why can only certail materials be magnets? 7 -What are the similarities between electric field lines and magnetic field lines? 8 - What is the key difference between them? 9 - What does the reproduction of south and north pole in magnets divided in half? 10 - What is the measure unit for magnetic fields? How many Newton per Ampere-meter does it correspond to? 11 - What else did prof. Oersted discover during that lecture? How? 12 - What was prof. Oersted's third discovery after a few more months? 13 - a) How can the direction of electric current and that one of magnetic field be remembered? b) How many right-hand rules are there? c) What does the FIRST right-hand rule say? d) What is the consequence? 14 - a) Why is the ....... ... right-hand rule useful? b) How can you figure the direction of the magnetic field out? c) What does the thumb direction show? c) How is the strength of the magnetic force represented? d) Explain the equation.

[@sausekshi]

she explains the topic so fast and effectively , nice teacher

[@bharatgupta3993]

"Point your arm..." *Uses Fleming's left hand rule instead* *Feels like the smartest person alive*

[@RosieRose8D]

Lessons worth Half of a semester in one video. Brilliant.

[@devmanek]

Rosie Rose Are you kidding me that's just 6th grade portion

[@ayanotpersonal]

Once again, Crash Course is a lifesaver. Thank you for saving my physics grade 😂

[@dhairyshrivastava988]

This was really a crash course. I have been searching for such a video for hours, finally I got one with magnetic force on a particle and it's formulas. Great video pls keep making such videos 😃😁

[@LetsGoDinosaurs]

Great video, gotta rewatch this a few times 😅

[@pooja05rejoice]

I thank the Graphic Team.. Wonderful job.. :) The lecture goes so comprehensive wit the graphics.. Makes easy to understand

[@andrewraslan5348]

"No, you dunce, she means magnetism!" "... magnets are cool, too"

[@studymode1390]

People who are struggling to understand her coz maybe she is a bit too fast, tryna play the video at speed 0.75 It helps! Btw, she is acc amazing

[@pabl0775]

thanks alot that actually helped alot

[@carlymeowx]

You guys are awesome, just wanted to let you know. Thanks for everything!

[@DogzD4]

Love the video. Very informative! I am currently in the process of experimenting with magnetic fields, and also high frequency sound waves. But understanding is key here and going back to the basics has proven more helpful then anything. Once you learn the basics of how energy works. Then as a human being you can manipulate that energy to your will.

[@stepbystepscience]

At least I know where my missing Giancoli went.....

[@user-gr1mt7zj9u]

4:30- can also be found out using Fleming’s Left Hand Rule, from what I learned.

[@colintheboywonder]

This video was so well constructed, now I have to find all of your other videos because you've explained this so well. Time to learn! Thank you!

[@thotchocolate8503]

WAIT SO THE SOUTH POLE IS TECHNICALLY THE NORTH POLE dAdDy CLaUs iS iN aNtArCtIcA

[@coltonkersting8003]

The FBI lied to us again

[@YgsExperttv]

@THe pUmPkIn ,RuLeR oF iLlUmiNatI ConFirMed your part of area 51 mission,cover blown

[@idrisitogs]

My teaacher needed 4 lessons to explain all this, and i still didnt get it. 9 minute video, and here i am, ready for the exam.

[@Jam3zGe51990]

Fuckin' Magnets, how do they work?

[@thegaymaker]

Jim James Was searching the comments for someone who'd post that lol

[@ObitoSigma]

When particles are in relative motion, they induce a magnetic field. Remember that, even though electrons move at drift speed, current travels near the speed of light which means Special Relativity takes place. The magnetic field causes, according to Maxwell's fourth equation, a changing electric field that will induce a magnetic field around a close loop. All particles have an intrinsic property known as spin that defines its magnetic properties, all of which are caused due to relative motion. It may have spin angular momentum (on its own) or orbital angular momentum (such as electrons orbiting nucleons). We mostly look at electrons because their magnetic dipole moments are thousands of times greater than protons or neutrons. Before I move on, in quantum physics, we can only measure one component which are quantized. For the z direction, the spin / orbital angular momentum is proportional to its spin. For an electron, through experimentations, half of the time an electron will have a downward dipole moment, and the other half of the time an electron will have an upward dipole moment. Thus, we conclude that the spin of an electron is plus or minus 1/2. When the electron is spin-up, its spin is +1/2. When the electron is spin-down, its spin is -1/2. The magnetic dipole moments are vectors and thus have an associated direction. Due to random disperse of electrons in all different directions, they tend to cancel out making most materials not magnetic. Let's look at Chemistry for a second at electron orbitals. Remember that electrons like to pair? Spin-up electrons like to pair with spin-down electrons; that's how bonding happens. Materials are magnetic only if the combination of all the magnetic dipoles line up to produce a magnetic field, and, as you can tell, this would never spontaneously happen. However, due to chemical properties, it is possible for some materials to be permanently magnetic while others could only be temporarily magnetic. There are three types of magnetic materials. Let's start with Diamagnetism. This occurs when most of the electrons are paired up in a material. This is the weakest type of magnetism, and all of us (you, me, wooden chairs, etc) are diamagnetic because our electrons are, for the most part, paired up. Have you ever seen a frog levitate due to magnetism? That frog is experiencing diamagnetism. Basically, an external magnetic field is applying a magnetic force on the object away from the source of the magnetic force. That magnetic field induces the electrons in the material to line up, causing it to be magnetic. However, the magnetic field induced in the diamagnetic material opposes the external magnetic field. This pushes the diamagnetic material (e.g. the frog) away to a less magnetic field (like the air). However, diamagnetic materials are only temporarily magnetic. Once you remove the magnetic field, diamagnetic materials lose all magnetic properties. Next is paramagnetism. Remember what I was saying about unpaired electrons? This is why some elements like the Noble Gases or sodium ions are least magnetic because they have a stable set of paired electrons. Surprisingly, this shows that carbon is more magnetic than fluorine (interesting organic properties). However, if we look at the elements where there are the most unpaired electrons such as the rare earth, actinide, or transition metals, we can see that they are in between full sets of electron orbitals and thus have TONS of unpaired electrons. (Look at iron! It's in the middle of the transition metals, and even though it has 4 levels, it has 4 unpaired electrons hidden in the 3rd level which resists bonding!) Again, an external magnetic field can orient these unpaired electrons to make such materials magnetic and induce their own magnetic field. However, unlike diamagnetic materials whose magnetic fields fight against the external magnetic field, paramagnetic induced magnetic fields actually add up with the external magnetic field to attract to a higher magnetic field. However, like diamagnetic materials, once you remove the external magnetic field, the paramagnetic materials lose their magnetic properties. This explains why you can't make permanent magnets out of most elements like carbon or oxygen. The last class is ferromagnetism. Ferromagnetic materials are a special type of paramagnetic materials in that, once an external magnetic field is applied, the dipole moments permanently line up forming a permanent magnet. Ferromagnetic materials are typically materials like iron, cobalt, nickel, germanium, and several other materials. This is because their materials are typically arranged in domains. Each domain has their dipole moments arranged in a single direction; however, each domain faces a different direction causing their to be no net magnetic field normally. Once the external magnetic field is introduced, these domains in iron or cobalt line up resulting in permanent magnets. One final note is that increasing the temperature will cause a material to lose its magnetic properties due to quantum effects, but I'm sure you can imagine that increasing the temperature would cause dipole moments to move in all sorts of directions which would ultimately lead to lose such magnetic properties. What I have just explained is why magnets exist in the way they do. If you want to understand how magnets attract, I'm sure you can easily deduct that from this video. A magnet produces magnetic field lines, similar to electric field lines. Once a magnet detects another set of magnetic field lines, they either repel or attract like charges. Magnetic field lines come out of the North end and come into the South end. (This explains why magnetic monopoles can't exist. The field lines are always coming in from somewhere and coming out the other end. When you cut a magnet, field lines regardless come in from one end and exit the other end.) So when you place a North next to a South, the field lines of the North want to come into the South, so they push toward each other. Similarly, a North and a North are both pushing their field lines away from each other. Is there anything else you would like me to explain or clarify? I apologize if I lost you somewhere.

[@Jam3zGe51990]

Obito Sigma and How long did that take you to copy and paste from the internet? LOL :D

[@Jam3zGe51990]

Xavier Underdog LOL! I'm the smartest Juggalo in the world :D

[@perpetualpolymath5961]

That doesn't explain why they exist for you to fully explain it you must understand Einsteins Special theory of relativity.

[@drewgoforth2418]

do y’all know the answers to my science homework

[@thoughtsofalostoneofalosto2591]

Thank you beautiful human beings for the knowledge.

[@malignor9035]

But... but... what *is* magnetic field?!?!

[@Lifeisawheelie]

malignor 5:04 hahahahaha. Doesnt make sense to me either. Not that ive tried really to wrap my head around it

[@Sporkabyte]

malignor think of it this way: a particle is something that has a value at a single point in space, where a field has a value at every point in space. In this case, we're dealing with a vector field, so every point in space will have a vector associated with it that represents the strength of the magnetic field at that point.

[@monkeywage]

I know you're joking but I find it fascinating people actually questioned the nature of magnetic fields but the same people never questioned "what is an electron?".

[@TGC40401]

In field theory, magnetism is a distortion in the ever-present element of the universe known as the magnetic field. In the same way that gravity is a distortion of what is known as space. Does that help?

[@ssun190]

Its a gas of photons constantly being emitted and reabsorbed by the electron. You can show this by calculating the group behavior of a gas of photons is the electric/magnetic field. Its why when you move relative to an electron (electric current) you get a magnetic instead of electric field. Magnetic and electric fields are not actually two separate objects, they are actually just two parts of the same gas of photons. Which part you see more of depends on the frame that you are moving relative to the electron. So electric/magnetic field = light bouncing around

[@miners132]

This series has saved so many students

[@alien9279]

Just me or has the animation gotten wayyyy better?

[@shawndelmay9525]

Thank you so much for this I am taking this class next semester and I will be looking at your videos for guidance

[@srpilha]

I usually watch the (spoken) ad at the end because if I like the advertiser I can consider supporting CC. But when I saw "suppose a 25 year old makes 40 grand a year" and wheeeeeee there goes my relatability. Switch those numbers and you're closer to my own reality.

[@MarahLovesMusic]

peeps it's a crash course.. supposed to be short and fast, just pause the vid to take notes

[@anonymousanonymous4510]

I'd like to know the very fundamentals of magnetism.. in particular the particles that make up magnetic field as well as info on why it moves from north pole to south, and other interesting facts.. I'm guessing it has something to do with electron spin and perhaps positive and negative charges.. also knowing the exact principes of how iron ore is magnetised (does it reposition electrons in a certain patern..?) and the underlaying corelation between magnetism & electricity.. it would be nice to have simplified explanation of magnetism in how it interacts and affects particles, and what particles are involved.. also if it has any relation to quantum mechanics. I'm curious about these things because it seems most of videos about the subject of magnetism only explains what is a magnet (as an object) and how its magnetic fields interact with other fields.. for whatever reason people refrain from explaining most important thing of "why it works the way it does".. it's the same thing people do with gravity, they specify what gravity is, but they fail to explain the very fundamentals of how exactly it works, cause after all saying that "mass warps spacetime which creates gravity" doesj't really explain why :-)

[@secularmonk5176]

A universal constant to define left and right! "When an electrical current is observed flowing upward, the direction of the magnetic field between the current and the observer is right, for the observer".

[@dujl]

No, because you haven't defined "up" and "down" by any objective means. ;)

[@secularmonk5176]

dujl​​​ For a human, "up" is a vector within the observer's plane of symmetry from feet to head; "down" is its opposite. The electric current producing the magnetic field is also aligned with the observer's plane of symmetry.

[@dujl]

"Feet" and "head" are subjective terms.

[@secularmonk5176]

We could define it by the plane of symmetry with the observer's brain. Without that structure, there is no observer.

[@dujl]

Yes, but in theory an observer could have multiple brains at different ends, and same with eyeballs. You're applying an anthropocentric perspective. If let's say human anatomy was asymmetrical, and one arm was always longer than the other, you could say that the left hand side is the one perpendicular to your head, where your arm is longer or shorter.

[@ILikedGooglePlus]

Perfect, I was struggling to get to sleep but now I'll be off in no time now that I've found this video

[@muhammadnalwala9742]

Thank you for this amazing explanation and the joke was really funny 😂

[@drastichaudhari]

This video helped me the most out of anything!!! Thank you. and those ppl complaining about how fast they talk... um just be grateful we got these videos and that too free.

[@Happycactus-s1q]

No. It’s annoying when any teacher talks too fast because it ends up going in one ear and out the other. It doesn’t make anyone any smarter to be able to focus on someone talking super fast. I won’t just “be grateful” we get these videos. They aren’t a charity, they get paid to do this, and since the majority of viewers want her to talk slower, she should talk slower. The more people like and come back to their videos, the more money they make. The more annoyed people get with someone talking ultra fast, the less money they make. Don’t tell people to “be grateful” for the videos crash course is PAID to make.

[@crystalcheetah6028]

Thank you, it was really helpful and I really enjoyed it😊. thank you Dr. Shini.❤️

[@apoorvtyagi7441]

What a lesson! Thanks. You saved much of my time.

[@housepandacrew581]

"All you have to understand is this" `*JAZZHANDS!*

[@marker113]

hidden knowledge: our bodies are magnetically designed with positive and negative sides- front and back, side to side. this channel isn't really sharing much real wisdom just a bunch of theories and distraction. I'm actually going to unsubscribe because most of what was said was untrue to me- also insurance is a fraud

[@abishekraju4521]

liked it cuz it was funny

[@WaddleYT]

Crash Course Coming in the Clutch! Magnetism test tomorrow lol

[@vikusik501]

Waddle literally just had my test a day ago and struggled so much cause our teacher is not very good at explaining the concepts

[@HannaAnderberg]

Excellent pronunciation of the letter Ø!

[@daleearnhardt817]

Nice job, way better than the dork that used to do crash course

[@roylaufer9233]

Gee... this my first time watching this 'channel', and now I feel like I had too many cups of coffee. Pauses can be our friend. Towards the beginning, there was some odd statement that 'cobalt, nickel, and iron aren't magnets' - they are ALL ferromagnetic and can be turned into permanent magnets. Paramagnetic materials are attracted to magnets but cannot be permanently magnitized. I think it is worth taking a breath or two and not confusing people who are trying to learn.

[@jolo7005]

Thank you so much for this! Very helpful and informative.

[@dippy9119]

Great to see original physics content on KZbin, but I long for the day when "Physics Concepts" and "Physics Measurements" get taught as separate subjects.

[@teachermichaelmaalim6103]

That is a good point. Actually, the observations, history, measurements, calculations, hypotheses and applications need to be presented separately and clearly. Academic physics mixes all of them, emphasizes on the hypotheses and ignores the applications. This makes physics look like a belief system.

[@SotraEngine4]

As my physics textbook neglected beeing produced with the intro pages on magnetism, this is very helpful

[@ierax29]

These videos are actually really good after you've attended class but they may be confusing if you're really clueless on the topic.

[@maixl8631]

The more charge the particle has, the stronger the force! *Rey wants to know your location*

[@mountedczarina9205]

"Foolish humans. Sending a metal man to stop the master of magnetism."

[@lanest.2733]

wow this is so coherent! thank you!

[@K_sawftie]

Good luck to all the struggling students out there.

[@VampireTheory]

This is one of the few people I've heard pronounce Ørsted's name at least fairly correctly. She came really close!! Which is awesome

[@lilmattmondays6814]

Playback speed best at 0.75 when starting equations YOUR WELCOME 🙏

[@enkiimuto1041]

She explains it really well =)

[@seanfeeney8170]

i needed thiiiiiiisssss right now !!

[@joshy-c5389]

love the lego millenium falcon in the background

[@anthonymcmackin1536]

Great video... Entertaining and informative. 🌞

[@zluttony]

For the equation F = Q V B sin(theta), what is theta since there is no angle between the wire and B (since this is the equation for a single point charge)

[@geraldellis1177]

i love this channel sooo much

[@gedfire]

Cool stuff.New look Crashcourse.

[@alexandriteleighmontecarlo5264]

Thanks Ms. You saved my school's pride

[@joseluchoviajero]

Thanks for this video!

[@SlothinGames]

Don't know about US prices but on Amazon in UK you can get magnets and iron filings for under £10, so if you're out of school 'cause of Covid, got a bit of pocket money and you like learning with practical experiments take a look

[@TheRegret]

so can you create a magnet by churning molten iron at a high enough temperature that the electrons can move between each atom of iron? aka our molten core in small scale?

[@lukajanko]

There is a mistake at 2:28. Tesla was a Serb who was born in the Austrian Empire, in a village called Smiljan located in modern day Croatia. He later moved to US, so saying that he is Croatian-American is kinda wrong. A quick Google search would confirm that.

[@abishekraju4521]

good research on that m8. You're from ?

[@devenirdelostiempos]

lukajanko austro-hungarian empire

[@SLACKLINEDUDE]

Yea that's what I thought

[@armunalam]

If I move to America and get an American citizenship, I will also be called an American, it doesn't matter where I was born! Same goes for Einstein who was a German-American Physicist, but he rejected his German citizenship and had many other citizenships as well. Therefore Wikipedia simply describes him as a German-born Physicist!

[@Keaze]

First, it wasn't the Austrian Empire, it was Austro-Hungarian Empire. Second, Croatia still existed and was recognized under Austro-Hungary, it had semi-autonomous status.

[@gman21266]

Educated = being able to talk about a subject accurately. Smart = being able to talk about a subject slowly enough that others can understand what is being said.

[@kevinchau5336]

these videos are perfect for my E+M class! just get the key points and then apply these concepts with math and boom! 4.0 GPA!

[@wahidhamidy6886]

That is really helpful, thanks a lot pale!

[@al1383]

Theoria Apophasis channel on YT actually shows magnetic fields in a magnet. I won’t even attempt to explain how, but it worth watching.

[@nyanmask395]

CrashCourse uploads doesn't pop up in my subscription anymore. I thought the channel was dead, but when I checked it, it was as lively as ever. D'fck youtube?

[@chrisannfernandes7263]

Nice lecture. It was very helpful☺

[@yashgupta-dw7sn]

Sir plz solve this question with step wise description....the electric field of an electromagnetic wave is given by E=E°cos[π(o.3x+0.4y-1000t)]k.find the associated magnetic field B?

[@DearNotebook]

When i have to enjoy study i watch crash course 😍

[@Roadto-zb4vu]

Insane Clown Posse reference at 1:12.

[@davidbishop456]

I feel my coils hummm as i drift through your dark matter. god forbid we separate and communicate at great distances to seek our return and one again colaps together as one.

[@chaio.4679]

SLOWW DOWNNNN!

[@925LY]

Learn how to process information faster.

[@thechillmaster5836]

Esoteric Botanist or she could just talk slower for people who have to take notes on this

[@williamkoleszar3301]

May I present to you the pause button

[@thechillmaster5836]

William Koleszar and how is that gonna help

[@renatanesio]

Speed option is up there

[@Laff700]

But how do magnets work on a fundamental level??? Like how does a system of negative charges going around in a circle with a positive charge in the center attract and repel another of such system based on orientation.

[@ryanremembers]

Laff700 check out theoria apophisis (spelling?) on KZbin. Prepare to have your mind blown.

[@marker113]

yes! was looking for this reference because this video only scratches the surface of what science says ether perturbations are. and I also think the idea of particles is hilarious. holograms are flat

[@Laff700]

marker113 ???

[@Laff700]

I would like to suggest what I think makes magnets work. Say a particle is traveling at a constant velocity. Any particle feeling the field being created by the first particle would see the particle where it actually is at that time. It wouldn't see it at the location it was when it generated that force. This is because the force being emitted contains information on the particle's velocity at the time it was emitted. This can be seen in this simulation(phet.colorado.edu/sims/radiating-charge/radiating-charge_en.html). I think that when there are charges of the same type going in a circle they create a magnetic field due to this effect and relativistic effects.

[@markholm7050]

Dairy fArmour I checked out Theoris Apophasis' videos on magnetism. He is not teaching physics. He is teaching some sort of pseudoscientific nonsense. If you listen to his videos and believe what he says, you will only be confused when you try to learn the real physics of magnets. The physics of permanent magnets is actually difficult. Most beginning physics courses, such as this Crash Course series of videos, do not try to cover it. Instead, they cover electromagnets, which are easier to understand. An understanding of the mathematics of electromagnetism will be necessary when one advances to the level of understanding permanent magnets. At the level of introductory physics, it is better simply to accept that permanent magnets exist and have the properties that have been observed.

[@Kris-lg9rj]

Except the 1st right hand rule other 2 were unkown to me. Thanks a lot for this video ma'am

[@juliusmakambwe2499]

Thank you😁😁😁😁 third rule just got way easier

[@gigabyte2248]

To answer the meme-questions seriously for a minute... We don't actually know how magnets work. I mean, not completely - we have some models but they still don't reflect reality perfectly. Ferromagnetism ('normal' magnetism) is often explained by spin polarisation - all particles have a weird quantum property called spin and all the spins in a bar of iron aligning would give an effect like the ferromagnetism we see. However, when we run the numbers, spin polarisation comes up about 100 times weaker than reality. There are some other models based on charge interaction but the lecture I was attending had lost me by this point - I'm just an engineer and if any condensed matter physicists can pick this one up for me, please do (I've probably butchered it :P )

[@colorsandsymbols8994]

Love the videos you guys make! It's so easy to understand!

[@menatallashaarawy7829]

Not necessarily having this to be a MUST for it to be here , now or ever , but I was wondering if they would ever add another subject they would make it about geography??? Not forcing though I know they may be having a hard time to do these videos so yeah but in case if they were able to (no pressure) like as a next subject

[@declanducc3139]

Aren’t the electrons flowing the wrong way in the battery at 2:47? It should be Anode (-) to cathode (+), right? It’s going from positive to negative in the animation.

[@egay86292]

interesting communication skills.

[@Doc_Loc]

It's kinda handy (BADUM CRASH) Me: Jimmy bring daddy his shotgun

[@renuts372]

Thanks for this video to help me with my presentation about magnets

[@solarpanel8195]

I could learn anything with her teaching

[@sadaque7490]

awesome ❤👍 greetings from Perú