Magnetic Field of a Coil

Iron filings are used to visualize the magnetic fields generated by coils. Ampere's circuital law is applied to a solenoid to determine the magnetic field intensity.

[@Rakshit_Chothani]

Dislikes are from the teachers who taught this to their students without practicals Thank you sir for this practical

[@Carlo99yehey]

E

[@chinthasaikumar6163]

@@Carlo99yehey good work man

[@Carlo99yehey]

@@chinthasaikumar6163 thanks, i didnt do the work, i found this on reddit.

[@W_hassan]

@@Carlo99yehey what is that

[@voidex136]

@@W_hassan a face

[@googolnews2781]

This is how teacher must teach students practical.

[@fayeharrison1741]

Blame school funding.

[@Pixeliarmus]

you can't do it for everything though

[@OXIR]

Exactly. We don't even do chemical experiments. Only on books, just write the laws.

[@Lemon3_Works]

@@OXIR yeah that's why there is alot of flat earthers...

[@unsanitizedbabywipes6154]

@@fayeharrison1741 school funding? lol this can be even done with scraps

[@arpitgupta2502]

After 3 years KZbin recommended me this knowledgeable video👍

[@amitk-g1860]

To me

[@Sanjaykumar-gj4ho]

Me also

[@sindhum6624]

Same

[@roshnimishra4013]

Same here ☺️

[@dr.manojbanchare6612]

Same

[@NightRunner417]

I think of Michael Faraday doing his first experiments with iron filings and how it must have blown his mind to see these patterns jerk into position once current was applied. He must have felt like he had revealed something immensely profound, something truly magical.

[@electricandmagneticfields2314]

I'm sure he did, many times!

[@martinkuliza]

i think of Faraday sitting there performing this experiment and saying Hmmm... No reaction, it didn't work hang on .. wait... shit i mixed up the iron filing jar with the pepper jar LOL then his mum is like Michael , stop playing with your copper wires and he's like............ Just 5 more minutes mum and she's like Michael....................now !!! LOL

[@NightRunner417]

@@martinkuliza 🤣

[@sanishgupta2321]

Today's generation is very lucky to get all the things online.

[@Tacticaviator7]

It can sadly also be a bad thing, by "all things" you can get some not so great nor helpful knowledge, I guess everything will always stay balanced and nothing ever will be completely "good".

[@pradeepchaudhary6297]

Every generation is better than predecessors but we cannot denies benefits of digital revolution after jio

[@KNJfan]

I will say its the opposite...

[@potchequinhadostchongos5550]

Agreed (as a google classroom student )

[@spoopyscaryskelebones3846]

@@Tacticaviator7 not false

[@thethosi.m3462]

I am now certain that my career would've taken a different path had KZbin existed 27 years ago.

[@sandhyasharma3860]

Hii...Same here.. may I know from where you are ??@the thos.M

[@thethosi.m3462]

USA

[@sandhyasharma3860]

@@thethosi.m3462 thanks..

[@ftmmk7039]

So what are u majoring in now sir ?

[@truptipatnaik3503]

I feel the same sir

[@0Freguenedy0]

That was one of my college experiments. I think it's a lot of fun. We also measured the earth magnetic field magnitude by sum of vectors

[@zhibaniola6460]

sir how does the earth's magnetic field work? and how do you relate it to the magnets we are using right now?

[@TheNBKiller]

@@zhibaniola6460 From what I understand... The movement of the fluid within the Earth's iron outer core creates electric currents which produce a magnetic field.

[@jasminpradhan3993]

I always wanted to see the magnetic lines And the solenoid's one looks so good and clear too It's amazing 💫 Thank you....

[@antiquarian1773]

I love the interaction between electricity and magnetic field. THanks for this video!

[@knockknockp]

0:13 To show you the power of coil, I sawed this dowel rod in half!

[@ricobrawlstars4880]

Good work

[@lil_moonrain]

It sounds.. familiar

[@pawan4920]

Dr phil

[@walterwhite4699]

@@pawan4920 no.... “Phil Swift from Flex Tape”

[@EmergencyTemporalShift]

@@walterwhite4699 he was a boat doctor right?

[@brandonunglaub]

I dont know how I got here BUT I LIKE IT

[@naturalmilkhoneyandzenretr9508]

I like you

[@Tera4m]

The Force is strong in this One🤙🏽

[@Jacques80120]

This showed up in my recommend and I first read the title as "magnetic field of e-coli" 😂

[@jasmine-jz7ri]

thanks for this demonstration, helped a lot to understand the concept!

[@haz7915]

Magnificent! Your ability to list all steps in detail is exquisite and your explanation is flawless

[@nowt4rob]

How is the magnetic field strength changed by the radius of the linear coil? I wonder if it diminishes in strength according to the inverse square of the radius. Should there not be another variable included? Eg. H = NI/(r^2)L

[@DMSGP19]

Fairly understood all concepts. Thanks sir, for this elegant video.

[@oompalumpus699]

I feel so fortunate to have been born in an era where people who are dedicated and passionate about knowledge can share what they know with the rest of the world.

[@TheCollectiveHexagon]

2:05 its so cool how it forms a 3D image of a torus on a 2d plate!!

[@AAvfx]

It's like a torus from inside!

[@EthanRain2009]

its u

[@tikit601]

Its always uuu

[@thealdoc]

Yeah, trippy

[@krishnasrinivasan7541]

Very beautiful experiment. Thank you so much for posting this video.

[@electricandmagneticfields2314]

You are welcome!

[@theexperimenteerc659]

Great method of explanation.

[@abhishekyaduvanshi9635]

That was epic.....randomly recommended but it was amazing❤️👍

[@piyushnemade]

Wow😍😍 well explain sir many of students were imagining this with diagram. But today I watch it practically thankyou ❤️

[@OneShotKill711]

Fantastic video! Very clear and concise.

[@palak6981]

Thanks for all the efforts that made the concept crystal clear.

[@electricandmagneticfields2314]

You are welcome!

[@justabrony2213]

This is ASMR and educational at the same time making me wanna watch it more :P

[@jevil8714]

I'm either gonna fall asleep or learn something new. Both of which are my favorite things.

[@subzeroelectronics3022]

I was wondering why so many people never saw this demonstration. Then I realized that I never saw this in school, I only learned it from my grandparents on weekends.

[@alihamid4816]

Woah that's so cool bro

[@josepedrogaleanogomez4870]

Woah thats so cool bro

[@musicalvibes9403]

Woah that's so cool bro

[@lokeshchaudhary8857]

Woah that's so cool bro

[@dilashaadhikari1698]

Woah that's so cool bro

[@sheekhasuman8886]

Thanks a lot for such a wonderful video sir ! It really cleared all my doubts ☺️

[@henishgodwin5643]

Wow! It would be wonderful for me if I have got these such perfect online videos in my school days!

[@hieuthemedic4013]

This video has found me I wasn’t disappointed at this

[@iqranthing544]

I really love the making of the coil😍 The picturing of magnetic field was also very satisfying..

[@santosakowski9846]

This is really beautiful, and such an ingenious method of construction, too. Thank you!

[@electricandmagneticfields2314]

You are welcome and thank you for your kind words!

[@stevenmayhew3944]

I remember because of what you just mentioned in the video, the unit of magnetomotive force used to be the ampere-turn. The SI unit is weber.

[@prernabhatt1952]

Thank you Mr. Michael for this experiment . This video helps me to better understand the magnetic field lines ☺️👍. Again thank you for the good explanation . 😊. It made our doubts clear and it is very interesting and fun to see this video 🙂

[@Kcikd011]

thank you so much for the video! 👍👍👍

[@dgx-shorts]

It's is so beautiful. I have seen this in books. We need these experiments at school for better understanding to the students.

[@bhawnas8858]

Thank you, u made my a difficult chapter way easy to understand it now❤️❤️

[@MrStarxxx]

Thank you for the experiments. How much voltage did you apply? Did you measure the amperes needed to achieve the result?

[@electricandmagneticfields2314]

I used a 9V battery. I do not know the amperage.

[@shreya4012]

We have our 10th grade final exams coming up soon. Barely understood any of the topics in physics. Especially because of online classes. I really don't know how I found this video but I'm so glad I did. My teacher practically skimmed through this. Thanks!

[@electricandmagneticfields2314]

I have many videos on electricity and magnetism on my channel. Hopefully you will find many useful!

[@victoryfirst2878]

This is a very good information for working with coils. I like the education with hands on and visual aids make this very easy to understand. Look forward to more great videos from you Sir. Peace

[@electricandmagneticfields2314]

Thank you for your kind comments!

[@neetaspirant4117]

100% imp for this generation for practical knowledge👍👍👍🙏🙏🙏

[@JussiTuukkanen]

Great video, thank you

[@anshul6893]

I'm in my 10th Grade and this is amazing experiment never thought someone has really made a video like this 👍👍

[@off-gridhillbillystyle3735]

That's because teachers unions have fail Americans.

[@mlvvmd]

Wow!!! Amazing!!! If teachers might have taught me in this way, then my physics classes would have been more interesting. Also I wouldn't have ever tried to run away from my own subject.

[@jameselliott9397]

What is really needed is a video that shows the difference between wire sizes and number of turns on coils that would actually be used in motors and generators. With and without ferrite or steel cores. Driven as motor and non-driven as generator. Loosely and closely coupled. That would be very useful information to builders. I have a diagram I would like to share with you. Coils coupled in such a way that most people would think they would cancel each other out. However they do not.

[@fredmoura427]

Amazing experiment!!

[@sandhyasharma3860]

Hey..may I know where are u from ..I guess I have seen u

[@LondonMus]

Thank you for this great experiment. I’m wondering what material could block a magnetic field like the coil you made @1:20 from interfering with anything close to it? Many thanks

[@electricandmagneticfields2314]

To block a magnetic field you would need to use a ferromagnetic material.

[@spacefighting8505]

Look up Faraday's cage

[@beldewpie3174]

Ohh

[@srushtimalviya8559]

You are really great you made us understand better without using any animations.

[@electricandmagneticfields2314]

Thanks for your kind words!

[@amodernalchemist432]

That's awesome! The first one, with the iron filings, looked like a penciled drawing of a magnetic field.

[@electricandmagneticfields2314]

It is amazing!

[@drunkpixel568]

KZbin is more knowledgeable then the school.

[@malekmahmoud2555]

thank youuu.. from egypt

[@PiyushPatel-fw5nk]

😭

[@felixmeyer1972]

做了如此多的工作，就是为了证明一些想法，这样的人是值得尊敬的。

[@chrismallis205]

your voice is very steretypical of a science man.. i love it thanks from greece for this video

[@igxniisan6996]

2:03, The iron filings are actually "self orienting" their positions to align with the magnetic field lines generated by the coil.

[@mrutyunjayamuduli667]

Thank you for making such an informative video, the concept was completely cleared but what about the permeability?

[@electricandmagneticfields2314]

The Plexiglas is non-magnetic so the relative permeability is essentially 1.

[@nikolas8741]

EMF i love you bro!

[@erwinresearch9224]

Great! These fundamental experiments are important because they lead us back and show - that's my feeling - that the theory or knowledge about it needs to be increased and improved even more

[@genghizalseitov3807]

Very good explanation, clear idea.

[@one-critical-thinker]

Apple designing Mag Safe “Write that down, write that down”

[@punitm.4797]

is magsafe an electromagnet ? i thought it was a perma-magnet

[@nikhilgowda6521]

I read this in my highschool teaching👩‍🏫 and understanding the concept clearly 😎 After my post graduation studies 😂

[@sumantsinghyadav5853]

Because ur indian

[@markovnikov5264]

@@sumantsinghyadav5853 not only Indian I guess

[@roroto8872]

very good teach method, I didn't learn like this when I was middle school

[@SaurabhGupta-fm6nt]

It is an amazing expriment . Really loved it.😍

[@Belti200]

Ive taken this rod and SAWED IT IN HALF!

[@mitaskeledzija6269]

Imagine if the tapping changed the spin of the electrons xd or if the tapping was substituted for current.. idk how it works but it would be cool

[@deshbandhu2007]

Amazing...love from India.. thanks a lot sir...

[@allmysiklls4171]

For real feel of experiment your channel best thanku muje parctical dekhkne c sab cheeze ache c samj m aa ri h

[@electricandmagneticfields2314]

You are welcome!

[@mlvgowtham1]

After 12 years KZbin recommend this video great job man

[@alexlemma424]

Actually it's 3 years

[@tumojurushikkumar6400]

@@alexlemma424 🤣

[@slow4129]

bruh check the date of this, shit

[@nagangoudapatil4774]

Sir my question is 1 voltage of electric current can cover's how much area please give me answer sir🤔.But your explanation is very will🙂🙂

[@vishveshm9999]

Does that even make sense ? Lol..1 voltage ? Of current ?? U high bruh

[@anunknownsoldier3728]

Thanks for your demonstrations.

[@blandantey]

I have some questions. 1. What is exactly the interaction between the electric current that is flowing through the copper wire and the metal filings? My assumed answer is that the metal filings are being magnetized and so they are drawn to the copper wire, but I am not sure. 2. When a magnet is spun around a copper wire coil, is the wire producing electricity because the electrons from the wire are being stripped? Where exactly is the electrons coming from? The air? Or the copper wire itself? 3. As a magnet is spun inside a copper coil, is the coil then electrified? Then is that how we transfer the electricity to some kind of conductor that will then send that power to our homes? Want to know more about how the generators are functioned. 4. Last question for now, if electricity is simply electrons that are stripped from negatively charged atoms, then what is the nature of electrons? Is their nature just to flow and transfer that energy until it can settle somewhere? One more question, if magnets repel each other if we face the two like poles, could we not use that repulsion force to spin the generators in powerplants instead of using external power sources like coal, steam water and air? If we could use that repulsive energy that comes from a magnet, we could then have it recharge the magnets so that it can be strengthened so that the energy does not decay over time and use the excess energy to power our appliances is my assumption. Ok that is all I got for now.

[@b.e.nazarenko]

Hi. I think I can answer some of these questions: 1. The current inside the coil generates magnetic field around it (Biot-Savart law) that makes those metal filings move around the coil. Looking deeper we can say that constant current affects the magnetic moments of elementary particles that "creates" the magnetic field around material. I think quantum physics provides better explanation of it. 2. Well, I can't say what's it caused by in material. In physics it's called "Faraday's law of induction", it says that electric current occurs when the magnetic flux changes in time. 3. It depends on the form of the coil and the magnet. Theoretically you can find a magnet that can be rotated inside a coil and won't cause any sufficient electric current. Again, if the magnetic flux through the coil changes in time then it'll "create" electric current inside the coil. 4. Not only electrons, electric current is the rate of flow of electric charge, it can be created by any charge carrier that changes in time. In metal it's electron, in semiconductor it's electron and "hole". The electrons in metal won't simply move as you wish, talking about electric current, the electrons compensate energy difference between two points (electric potential difference). If there are no energy differene then there are no electric current inside. You should create a potential difference between two points and it can't be made without non-electric forces. 5. You can but it's all about energy. If I'm correct then after some time of rotating something the magnet will become weak because of energy loss. You can read more in articles about remanent magnetisation. Correct me if you find a mistake.

[@alchemy1]

@@b.e.nazarenko Wow I just realized something reading your reply I never noticed before. Do you realize that what said there in one juncture is that a magnet is sort of a capacitor that stores magnetic field just as a capacitor stores electric field. I used the word field instead of the word charge. Since charges create fields. Capacitors store energy in the form of voltage keeping opposite charges apart and storing electric field while in the coils with charge excitation, that are not separated create magnetic field in which when the excitation of charges stops, they use the term collapse, magnetic field collapses, becoming very intense and can cause serious danger crossing through whatever that capacitors can match as bad as they are. Magnets being very complex phenomenon store the magnetic field and unlike coils it takes a long time to lose it depending on the material. And it a permanent magnet magnetism field is not formed by means of charge moving but by means of charges aligning with their so called spin in the same direction.

[@b.e.nazarenko]

Blue Ocean it all sound right except for magnetic field collapse. As I know, demagnetization of ferromagnetic is described by a hysteresis loop and there are no sharp jumps in it. But you are right about everything else. In coils happens the same as in capacitor, except that capacitor accumulates electric charges and coil accumulates magnetic field.

[@alchemy1]

@@b.e.nazarenko To my understanding when you turn off power to any coil that magnetic field that is accumulated there collapses which I would think It means it can't keep its smooth curl loop by the excitation of the charges so it jumps through any gap and that is what makes transformers dangerous and diodes becomes necessary in circuit boards to protect instruments with every connect and disconnect, rerouting the charges. Capacitors are not used for this purpose as they would act as resonators if used that way with its own consequences. But they can not used to created an imbalance in the distribution of magnetic field as with induction motor to get it going and then turned off and is used as various means. It is interesting how everything has a personality even though those personalities and yet personalities change in different settings for a lack of a better way of saying it I guess. Didn't mean to get poetic on you. :-)

[@b.e.nazarenko]

Blue Ocean it’s okay. :) The field, that is accumulated in the coil, changes smoothly. According to physical laws, magnetic flux (flux linkage if we talk about circuit theory) changes smoothly. When you turn off the current in a circuit with coil, the field inside the coil creates electric current. For better explanation I provided mathematical explanation of this process: Ф=IL (magnetic flux = current * inductance). e=-dФ/dt=-LdI/dt (Faraday’s induction law); I=e/R => I=-L/R dI/dt dI/I=-R/Ldt We talk about coil with already accumulated magnetic field which is going down because we turned off the power in circuit. So the current changes from I0 to I and time from zero to t (here I is the current at time t and I0 is the current at time when we turned off the power in circuit): ln(I) - ln(I0)=-t/(L/R) ln(I/I0)=-t(L/R) Applying exp function here we get: I=I0*exp(-t/(L/R)) Here we see that the current, at the time when we turned off the power (t=0), equals to I0. And with time it is going down smoothly like exp function does. In transformers problems are caused by Foucault’s currents. Problem comes when magnetic field creates volume eddy currents inside the transformer’s magnetic material. Eddy current transforms it’s energy into heat and the transformer’s material starts heating. If you remember how transformer looks like then you might notice that the center material is not solid but consists of laminations parallel plates. This reduces eddy currents to the volume of one plate. Talking about circuits I remember that diode at input is used for power polarity protection.

[@harjassgambhir]

Sir i did this experiment, but there is one thing i was confused about. Why is there a gap between the magnetic field line?

[@electricandmagneticfields2314]

There is actually no gap. There is a magnetic field in the space between the iron filings. The gap seen in the filings is a consequence of the finite number of iron filings. The iron filings appear to be on a line because there is an attraction between each iron filing and the one in front, and the one in back, of it like this, If you could zoom in and put a miniature compass between the iron filings, such as between the two lines above, it would rotate and be parallel to the adjacent iron filings.

[@albertwang5974]

You can treat the magnetic as wave, when peak and valley meet, they cancel each other.

[@briansmith4853]

Hey man I really think I got the answer, and I don't think it has to do with the number of iron filings. I was reading up on it from a few sources, the khan academy has a reasonable answer (I believe)... The answer is in the 4th sentence in the following paragraph, hope it helps and would love feedback from Mr. Melloch or anyone else, thanks. "Field lines can be visualized quite easily in the real world. This is commonly done with iron filings dropped on a surface near something magnetic. Each filing behaves like a tiny magnet with a north and south pole. The filings naturally separate from each other because similar poles repel each other. The result is a pattern that resembles field lines. While the general pattern will always be the same, the exact position and density of lines of filings depends on how the filings happened to fall, their size and magnetic properties" ALL in all what I interpret from this explanation is that the iron filings in a sense become like two magnets sitting side by side with their poles oriented the same so that they tend to repel one another... I would absolutely love to know just how many field lines a particular magnet or electromagnetic gives off, that would be sweet, like is the number in the hundreds, thousands, etc. for say a small 1 cubic inch magnet.

[@joeljose182]

@@briansmith4853 so does it mean that if i use a smaller sized sand grains i could get more number of lines than lager grains since the repulsion would be lower in that case

[@briansmith4853]

@@joeljose182 Man that would be interesting to see the results of the surface area/ size of the filings .. The way I interprete magnetism, yeah.. Just think if you used iron dust or something like that small and compared it to much larger filings? That would give some clear results.. Good question man

[@ricobrawlstars4880]

Your explanation helped me a lot.......

[@animeshnanda1]

Wonderful illustration!!!

[@anonymous_bacon2383]

7:09 is that a hot dog

[@mdellertson]

with a side of EM relish

[@1ecafuentes]

Cheeseburger, depends on your point of view ;)

[@leilagueno8511]

no it’s a glizzy

[@anonymous_bacon2383]

@@leilagueno8511 Wow real smart

[@lightning_hawk951]

No it's la*da lassan

[@victorvictor8587]

Distorting the Matrix is how I interpret a Magnetic Field .

[@erikottema2620]

what about gravity then?

[@sujitkumar6583]

Great video made by you Thanks a lot

[@adeebasiddiqui1084]

Sir u are really great u really explain it superb... Thq for the things that u made to clear thia experiment ❤❤

[@electricandmagneticfields2314]

Thanks for your kind words about the videos!

[@syedmohdfasihnaqvi155]

This is the method of teaching physics in America In India: Flux=B.A E=Bvl In exam this type of questions come so solve ncert/hcv. Let's solve board questions Let"s solve jee/neet numericals

[@harrypote5710]

trust me dude plenty of American teachers are like this too lol

[@matimate8172]

That was a lot more efficient than 400 hours of school only dedicated to this

[@electricandmagneticfields2314]

Thank you!

[@irtzamalak2584]

Feels so good after understanding rather than cramming formulaee only..Thankyouu🙌

[@electricandmagneticfields2314]

You are most welcome!

[@ben_jammin242]

Super duper educational. Pls, repurpose your material to a younger audience. Some great learning, even a parent could do with their kid(s), using an old transformer etc. Great content. Thank you.

[@alaaalbasha4205]

Since when do you teach Physics Trump????????!!!!!!!!!

[@minkitt6867]

Ive learnt this recently! thanks for the yt recommendation

[@scipio2074]

thanks for sharing with us this knowledge! :)

[@smartspandan1942]

You tube recommend this video after 3 yrs... And seemed intresting to me...i watched it.... And also commented amazing!👍🏻👍🏻 After 3 years😜

[@4doorsmorewhors]

Really ... Amazing ...

[@pw3543]

Great teacher! Thank you

[@krish2nasa]

Nice demonstration. What are the magnetic fields (Virtual-Particles) made up of? Thank you very much.

[@davidhowells1568]

This is excellent, how it should be done. Not only shows the practical demonstration, but how to do the practical demonstration for yourself. The opposite of mystification.

[@electricandmagneticfields2314]

Thanks, glad you liked it!

[@kyatkyat7280]

the results are so ...........vivid. Thank you for making this video.

[@electricandmagneticfields2314]

You are welcome

[@theUnmeshraj]

Sad to see this video being recommended to us after 3 years

[@bsnphysicsclasses8856]

Excellent and awesome demonstration SIR

[@shanmugams7311]

Very good and creative explanation.

[@mayathoibilaiz9017]

Wow that was COOL I love watching these practical videoss🔥

[@electricandmagneticfields2314]

Thank you for watching!

[@sameerjadhav4532]

Best electrical practical i ever attended.

[@electricandmagneticfields2314]

Thank you! I've got plenty more.

[@namanchhibbbar2205]

great video! great teacher too :)

[@zynskavzynskav4465]

I like it perfect video, detailed and speak not to fast. Perfect for students learning.

[@electricandmagneticfields2314]

Thank You!

[@alllove1754]

Thank you, your video helps explain to me much more than i can expound on and in time, a few years from this comment, your spirit can be jovial in knowing even this video really mattered to quantum science.

[@electricandmagneticfields2314]

Thank you for your kind words!

[@muhammeddikal8551]

That was very helpful. Thanks

[@caulkwater]

What type of energy is inside and how can you harness it? If it has I closed current then why can't we take that current into something

[@capt.heinrich6945]

To show you the magnetic field of coils, I sawed this dowel in half!

[@tooeric5]

Very precise in, demonstration ,and explanation.Nice teaching

[@electricandmagneticfields2314]

Thank You!

[@mimiargyle1794]

Hey i have a final tmr and this is one of the subjects how convenient