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.
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.
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
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".
@@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.
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
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.
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.
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
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.
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
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
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 🙂
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.
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.
@@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
@@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
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
In your 1st experiment with the multi-turn loop of circular wires, if you reverse the polarity of the current, will the field circles go in the other direction around the loops? From the positions of the iron fillings in the video, I can NOT tell which direction the loops are circling the wire? Secondary question: If you put a VERY high CURRENT, LOW FREQUENCY AC current through the loops (ignoring the high current burning up the wire), will you see movement of the iron filings switching direction with the AC? THANKS FOR THE GREAT VIDEOS!
Yes, switching the direction of the current will reverse the direction of the magnetic field. Yes, if the frequency was low enough so the iron filings could follow the AC signal, they would flip back and forth with the frequency of the AC signal.
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.
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.
@@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.
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.
@@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. :-)
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.
@Michael Melloh : Is there similar experiment You made with the TOROID form of coil? I hope it will be there one. Thanks - I do like this amazing video.
Plz may if you could list the apparatus used in the description And I wanted ask how many and how much volt batteries are used here? And will the coil would work with greater number of turns like in between 28-32?
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.
What is the source of current? Also is there a resistor that you have used? (since copper wire has practically negligible resistance would it not drain the batter instantaneously if the source of voltage difference is a battery?)
I attached a battery to the coil to generate the current. No resistor, as I wanted as large a current, and hence as large a magnetic field, as possible.
essentially magents are warp drives in basic terms, now put a maget attach a magnet inside that coil and it will try to accellerate.. pulling the coil with it, and essentially this is warp so the magnet isnt really moving..
I was reading about the magnetic field and came across the term 'moving magnetic field' and I have been unable to get a clear picture of what that entails. Could someone explain what it means that a magnetic field is moving?
Dislikes are from the teachers who taught this to their students without practicals
Thank you sir for this practical
E
@@Carlo99yehey good work man
@@chinthasaikumar6163 thanks, i didnt do the work, i found this on reddit.
@@Carlo99yehey what is that
@@W_hassan a face
This is how teacher must teach students practical.
Blame school funding.
you can't do it for everything though
Exactly. We don't even do chemical experiments. Only on books, just write the laws.
@@OXIR yeah that's why there is alot of flat earthers...
@@fayeharrison1741 school funding? lol this can be even done with scraps
After 3 years RUclips recommended me this knowledgeable video👍
To me
Me also
Same
Same here ☺️
Same
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.
I'm sure he did, many times!
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
@@martinkuliza 🤣
Today's generation is very lucky to get all the things online.
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".
Every generation is better than predecessors but we cannot denies benefits of digital revolution after jio
I will say its the opposite...
Agreed (as a google classroom student )
@@Tacticaviator7 not false
I am now certain that my career would've taken a different path had RUclips existed 27 years ago.
Hii...Same here.. may I know from where you are ??@the thos.M
USA
@@thethosi.m3462 thanks..
So what are u majoring in now sir ?
I feel the same sir
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
sir how does the earth's magnetic field work? and how do you relate it to the magnets we are using right now?
@@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.
0:13 To show you the power of coil, I sawed this dowel rod in half!
Good work
It sounds.. familiar
Dr phil
@@pawan4920 no.... “Phil Swift from Flex Tape”
@@walterwhite4699 he was a boat doctor right?
I dont know how I got here BUT I LIKE IT
I like you
The Force is strong in this One🤙🏽
I always wanted to see the magnetic lines
And the solenoid's one looks so good and clear too
It's amazing 💫 Thank you....
Magnificent! Your ability to list all steps in detail is exquisite and your explanation is flawless
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
It's like a torus from inside!
its u
Its always uuu
Yeah, trippy
This showed up in my recommend and I first read the title as "magnetic field of e-coli" 😂
I love the interaction between electricity and magnetic field. THanks for this video!
2:05 its so cool how it forms a 3D image of a torus on a 2d plate!!
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.
thanks for this demonstration, helped a lot to understand the concept!
Thank you for the experiments. How much voltage did you apply? Did you measure the amperes needed to achieve the result?
I used a 9V battery. I do not know the amperage.
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.
Woah that's so cool bro
Woah thats so cool bro
Woah that's so cool bro
Woah that's so cool bro
Woah that's so cool bro
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.
This is ASMR and educational at the same time making me wanna watch it more :P
I'm either gonna fall asleep or learn something new. Both of which are my favorite things.
Thanks for all the efforts that made the concept crystal clear.
You are welcome!
Fairly understood all concepts. Thanks sir, for this elegant video.
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
To block a magnetic field you would need to use a ferromagnetic material.
Look up Faraday's cage
Ohh
This video has found me
I wasn’t disappointed at this
Wow😍😍 well explain sir many of students were imagining this with diagram.
But today I watch it practically thankyou ❤️
That's awesome!
The first one, with the iron filings, looked like a penciled drawing of a magnetic field.
It is amazing!
Great method of explanation.
Very beautiful experiment. Thank you so much for posting this video.
You are welcome!
That was epic.....randomly recommended but it was amazing❤️👍
Sad to see this video being recommended to us after 3 years
Fantastic video! Very clear and concise.
I really love the making of the coil😍
The picturing of magnetic field was also very satisfying..
I'm in my 10th Grade and this is amazing experiment never thought someone has really made a video like this 👍👍
That's because teachers unions have fail Americans.
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
Nice demonstration. What are the magnetic fields (Virtual-Particles) made up of? Thank you very much.
Great video, thank you
thank you so much for the video! 👍👍👍
Wow! It would be wonderful for me if I have got these such perfect online videos in my school days!
This is really beautiful, and such an ingenious method of construction, too. Thank you!
You are welcome and thank you for your kind words!
2:03, The iron filings are actually "self orienting" their positions to align with the magnetic field lines generated by the coil.
Thank you for making such an informative video, the concept was completely cleared but what about the permeability?
The Plexiglas is non-magnetic so the relative permeability is essentially 1.
EMF i love you bro!
What current did you use to get this strength of magnetic field?
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.
RUclips is more knowledgeable then the school.
Apple designing Mag Safe
“Write that down, write that down”
is magsafe an electromagnet ? i thought it was a perma-magnet
For real feel of experiment your channel best thanku muje parctical dekhkne c sab cheeze ache c samj m aa ri h
You are welcome!
You are really great you made us understand better without using any animations.
Thanks for your kind words!
Amazing experiment!!
Hey..may I know where are u from ..I guess I have seen u
Ive taken this rod and SAWED IT IN HALF!
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
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
Thank you for your kind comments!
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 🙂
I read this in my highschool teaching👩🏫 and understanding the concept clearly 😎 After my post graduation studies 😂
Because ur indian
@@sumantsinghyadav5853 not only Indian I guess
It's is so beautiful. I have seen this in books. We need these experiments at school for better understanding to the students.
Thanks a lot for such a wonderful video sir ! It really cleared all my doubts ☺️
thank youuu.. from egypt
😭
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
100% imp for this generation for practical knowledge👍👍👍🙏🙏🙏
Feels so good after understanding rather than cramming formulaee only..Thankyouu🙌
You are most welcome!
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🙂🙂
Does that even make sense ? Lol..1 voltage ? Of current ?? U high bruh
Sir i did this experiment, but there is one thing i was confused about. Why is there a gap between the magnetic field line?
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.
You can treat the magnetic as wave, when peak and valley meet, they cancel each other.
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.
@@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
@@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
your voice is very steretypical of a science man.. i love it thanks from greece for this video
What was the loss of resistance due to the plastic or was there any?
After 12 years RUclips recommend this video great job man
Actually it's 3 years
@@alexlemma424 🤣
bruh check the date of this, shit
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
trust me dude plenty of American teachers are like this too lol
seems like the current in the longer circuit flows in from everywhere, not just at the end
In your 1st experiment with the multi-turn loop of circular wires, if you reverse the polarity of the current, will the field circles go in the other direction around the loops? From the positions of the iron fillings in the video, I can NOT tell which direction the loops are circling the wire?
Secondary question: If you put a VERY high CURRENT, LOW FREQUENCY AC current through the loops (ignoring the high current burning up the wire), will you see movement of the iron filings switching direction with the AC?
THANKS FOR THE GREAT VIDEOS!
Yes, switching the direction of the current will reverse the direction of the magnetic field.
Yes, if the frequency was low enough so the iron filings could follow the AC signal, they would flip back and forth with the frequency of the AC signal.
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.
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.
@@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.
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.
@@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. :-)
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.
7:09 is that a hot dog
with a side of EM relish
Cheeseburger, depends on your point of view ;)
no it’s a glizzy
@@leilagueno8511 Wow real smart
No it's la*da lassan
Wonderful illustration!!!
@Michael Melloh : Is there similar experiment You made with the TOROID form of coil? I hope it will be there one. Thanks - I do like this amazing video.
I have not, but I do for a straight wire, ruclips.net/video/caHXwJbkbQU/видео.html
Distorting the Matrix is how I interpret a Magnetic Field .
what about gravity then?
That was a lot more efficient than 400 hours of school only dedicated to this
Thank you!
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。
And to share those ideas with the world via the internet! Worthy of respect indeed.
Very good explanation, clear idea.
Since when do you teach Physics Trump????????!!!!!!!!!
Thank you, u made my a difficult chapter way easy to understand it now❤️❤️
Plz may if you could list the apparatus used in the description
And I wanted ask how many and how much volt batteries are used here?
And will the coil would work with greater number of turns like in between 28-32?
I used a 9V battery
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.
Amazing...love from India.. thanks a lot sir...
the results are so ...........vivid. Thank you for making this video.
You are welcome
very good teach method, I didn't learn like this when I was middle school
am trying to build a generator and i was wondering what magnet wire to chose and what gauge , is flat is better than round ?
Any magnetic wire should work, so choose what is convenient or that you can find that is inexpensive.
Thanks for your demonstrations.
What is the source of current?
Also is there a resistor that you have used? (since copper wire has practically negligible resistance would it not drain the batter instantaneously if the source of voltage difference is a battery?)
I attached a battery to the coil to generate the current. No resistor, as I wanted as large a current, and hence as large a magnetic field, as possible.
Amazing experiment bro
essentially magents are warp drives in basic terms, now put a maget attach a magnet inside that coil and it will try to accellerate.. pulling the coil with it, and essentially this is warp so the magnet isnt really moving..
great video!
great teacher too :)
Sir u are really great u really explain it superb... Thq for the things that u made to clear thia experiment ❤❤
Thanks for your kind words about the videos!
Great video made by you
Thanks a lot
Beautiful demonstration sir❤
Ive learnt this recently! thanks for the yt recommendation
Best electrical practical i ever attended.
Thank you! I've got plenty more.
"yay i get my new coil today" "never mind its just paper with a drawing..."
I was reading about the magnetic field and came across the term 'moving magnetic field' and I have been unable to get a clear picture of what that entails. Could someone explain what it means that a magnetic field is moving?
Invisible to human eyes but there are things moving there.
It is an amazing expriment . Really loved it.😍
Your explanation helped me a lot.......
You tube recommend this video after 3 yrs...
And seemed intresting to me...i watched it....
And also commented amazing!👍🏻👍🏻
After 3 years😜
Really ... Amazing ...
Hey i have a final tmr and this is one of the subjects how convenient