For those who didn't get it: (what he wanted to say was, though he didn't put it correctly) When that magnet is dropped through the metal pipe, it takes more time to come down, compared to a non magnetic bar with same geometry and mass. That's because of Lenz law, for the magnet, induced current in the metal pipe opposes the motion of magnet.( We know that a metal thing can turn into a magnet if rubbed to a magnet while if we move it near a metal thing a current will be produced in that)
It you really break the concept down its opposite of the way a motor works. The magnet is passing through the copper tube. With a motor the copper winding is inside of the magnetic field.
Long ago I came upon some maintnance engineers troubleshooting a motor braking problem, they wanted to remove the dynamic braking resistors. For some reason I said NO. They looked at me like I didn't know what I was talking about. Needless to say I found the issue. I learned Lenz's law and CEMF last century. Thank You to all my electrical theory instructors.
Thankyou so much for going to the effort and the explanation of Herr Lenz,s law --Now I understand the magnetic field principle -- opposing the velocity of the dropping magnet!---REALLY APPRECIATE your lessons --I vaguely remember a similar demo by my physics lecturer---way back in 1967!
Woah…. I didn’t have a live demonstration of this when I first learnt it in 10th grade but having a demonstration of it back in 1967?? That’s crazy to think about!! I’m thinking of all the things your generation missed out on solely because there the Internet didn’t exist to show you these things… the juxtaposition must be hard to comprehend right?
Current cannot oppose the mag etic flux that induced it! Induced Current produces an opposing magnetic field to that which induces the current! Don't mix your variables and confuse 😢 your physics professors here!
the magnet creates current in the copper tube while its moving then the current produces another magnetic field with the opposite direction, which negates the first magnetic field , slowing down the first field which produces less current, hence it is opposing production
Lenz's law states that the direction of the electric current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes changes in the initial magnetic field. It is named after physicist Emil Lenz, who formulated it in 1834.
I am concerned that you think your statement is helpful to a basically educated person. I saw a magnet, I saw a copper tube. You are talking about an electric current - I did not see that nor did Philip Russell describe that; you mention a changing magnetic field, and I am quite sure that the field generated by the magnet did not change, nor again did Philip Russell mention a changing magnetic field. So, you have inserted terminology not in evidence in the experiment and have thus explained nothing to someone who does not already understand Lenz' Law.
@@mgtowvaluesSince the position of the magnet changes with time, the magnetic field also changes with respect to time for the copper tube, and by Faraday's law, an emf will be generated due to the change in magnetic field... This means an electric current will be generated in the copper tube, and the direction of the current is such that it opposes the direction of magnetic field (Lenz's law), and thus there is a force applied to the magnet by the copper tube, resulting the magnet to slow down while falling.... I hope u understood a little bit
@@Hyp3r_Wolf Thank you for your response, but unfortunately, it remains opaque. Did you mean: "Since the position of the magnet changes with time with respect to the copper tube, the magnetic field also changes"? In other words, it is unclear what "the magnetic field for the copper tube also changes [with reconstructed grammatical subject]" means. Does this mean that the magnetic field is for the copper tube and not for, say, itself? Or just is in general? But more importantly, "there is a force applied to the magnet" - what type of force is this? In other words perhaps, due to Faraday's law in generating an electric current via spinning iron and copper, do we need to drop a magnet or just drop any chunk of iron down the copper tube? Also on a side issue, are you on board with the geo-dynamo theory?
For you to know, the movement of the magnet through the copper pipe, creates electric current thus an opposing magnetic field that breaks down the movement of the magnet, so it drops slowly.
While many of u will just ask where is Lenz law,but sir's example is used in various questions related to induced emf(for eg in JEE entrance exams in India) ,where we need to find out several factors like flux, emf induced etc,with some changes in the given scenario.
The speed of the magnet inside the pipe increases less and less rapidly. As the speed increases, there is a counterforce (opposing the weight) that increases at the same time. The increasing counterforce is caused by the interaction between the moving magnetic field of the magnet and the increasing magnetic field produced by the increasing current induced in the part of the pipe surrounding the magnet. This current (induced by electromagnetic induction) increases because the magnet goes faster and faster. After everything has reached a certain maximum value at the end of the pipe, the emerging magnet reaccelerates at the usual ``g`` of about 9.8 m/sec2, the electromagnetic counterweight not being there anymore.
@@rickandmorty2361 very few people who have commented actually realize he explained nothing, and what he did say teaches people wrong.. it's much slower than gravity due to creating it's own electromagnetic field.
Lenzes law states that if a conductor is placed in a varing magnetic field an EMF(voltage) is induced in the conductor such that a magnetic field is produced in the conductor which opposes the direction of the external magnetic field.
The magnets movement creates an counteracting magnetic field, that brakes the movement. (That is if the movement is along a conductor, so an electric current and hence a magnetic field is induced.)
Lenz's law states that the direction of the current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it.
@@GovindaKumar-108 it can't get any more simplified. But understanding the effect is easily achieved by doing the same experiment yourself . It only requires the cobber- or aluminium tube and a strong magnet, small enough to pass through. Peace
At normal speed you could see the field and the tumbling very well. This is a demonstration of the effect of Lenz's Law we are producing another video on the explanation of Lenz's Law.
When you drop the magnet down the copper pipe, the falling magnet induces an electric current into the walls of the pipe. The current induces a magnetic field that opposes the the decent of the falling magnet. So, the magnet then falls at a much slower speed than a non magnet.
Glad you enjoyed it and learnt something. I am doing more 1 minute science lessons because this is an easy way to learn and have some fun. If you subscribe and click the bell you will get to know as I release more videos.
Lenz's law states that the direction of the current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it.
Induced EMF is such that it opposes the cause which produces it. Thus produces an opposing magnetic field that produces a repelling force ie.the net acceleration on the magnet is reduced than that in a normal free fall.
Its Actuallly Generating Electricty. Can see better if Dropping through a long coil of copper wire. What makes it a little strange is, copper is not Magnetic, is what make Motors work.
@@illfather7066simply, gravity! The magnetic field induced in the copper tube that tried to oppose the motion of the magnet (which is basically what Lenz’s law is) simply wasnt strong enough in that time instant to completely stop the motion of the magnet. It’s not shown here very well (better off to say that it’s impossible to comprehend that without the comment section) but the induced magnetic field of the copper tube DID slow down the motion of the magnet (but not by very much to completely oppose the magnitude of gravity)
Lenz's law came out just after Faraday published his law. Faraday didn't realise that the direction changed things and Lenz did - so Faradays Law, Lenz's Law - take your pick. I chose Lenz.
The copper reacts with the magnet and alters the direction of charge I believe and it causes it to bounce off of little charges of repulsion back and forth but really fast. Something that only happens with copper tubes and magnets though. This clip actually shows it pretty well with the film and a disk magnet cause you can see it sliding off each magnetic momentary "shelf" basically. I've seen it done with a magnetic ball and i wasnt able to see that part of the affect.
@@PhilipRussell why did you say it falls at the speed of gravity? This video teaches misinformation.. it also explains nothing about the interaction between the copper and magnet, and the electromagnetic field.. do you know how a conventional dynamo works? Or an electric motor with copper windings? Just wondering.
@@mitchellcastillo2858 considering your comment was a month ago you've probably learned how a dynamo works by now... this doesn't show anything. Falls much slower than gravity.
NP and SP crumbles as it pass through the copper tube that is why the cylindrical magnet canot passthrough in straight direction. The inside diameter or the tube is the trick.
It's not a monks or an evil genius outfit, but a Howie Lab coat. This better than an ordinary lab coat, because it does right up to the neck. My students wear white and I wear Gold so they can easily see me in the lab.
Well i respect you very much sir for showing this as an experiment, i mean I've studied this during my entrance exams, only theoretically but this was fun watching it happen. Jokes apart, not everyone who watches shorts can understand this!✌
If the North Pole of the magnet move towards the coil the magnetic flux linked with the coil changes but this is possible only if the current is in the counter clockwise direction..
The dropping magnet induced a current in the copper pipe. Acc. to *Lenz's Law* the induced current opposes any change in itself. So when the magnet drops the magnetic field lines increase so the copper tube also gives out some field to counter those increasing magnetic filed lines.
This reminds me when i took the broken speedometer of my fathers car to my summer work place of military engineers and had like a competition about how it works. I had just learned Len's law in school and had an A in physics to I had figured it out quite easy. It is basically that any electric conductive material passing through changing magnetic field will induce a current and an opposing magnetic field. Their is a trick with you hand to figure out what direction the field will be. In the speedometer there is a rotating magnet inside a wheel with spokes. The faster it goes the harder the copper wheel wants o follow but a clock type spring is hindering to go around and instead show ho fast he magnet is spinning.
I asked my physics teacher ''sir what's lenz law" our chapter is going on and this topic is there he said dφ/dt....he didn't even said what it means(even what he said is neither here nor there)...on asking for the definition he said it is not asked in xam.... don't bother Such a lucky one is me.....
Some graphical animations like arrows showing directions of field and current could have enhanced the effectiveness of this demonstration. Still a very interesting experiment.
The material is Green Magnetic Field Viewing Film bought from www.amazon.co.uk/gp/product/B000UV6ZPS/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1 You can see a video on the magnetic film at magnetic film paper th-cam.com/video/xYKH5u0JYq8/w-d-xo.html
finally something new, so many of those copper tube videos, everyone is like "hey look, it drops slower cause of magnetic field" over and over for so many years. Getting tiring, but this is nice! Now to measure the current at certain points of the tube would be even more next level :D
The fall of material down the tube is meeting resistance to its interaction of the copper die pole resisting the change in polarity as the reluctance to change creates work so the magnet rate of descent produces a net loss of speed toward earth. This is an Eddy current brake for all intents.eddy currents are used in breaking a movement of some device by using a changing of polarity +/-/+/- etc. to thicken the non ferris material and increase the flux density can increase this braking effect as the interaction of flux density with a less than saturated copper tube gets the maximum effect when combined with a reduced air barrier from the surfaces of the id od of respective tube and disc. I don't recall lentz as the one with the formula used to define the interactions but he was a brilliant observer. A project that used lentz coils for the repelling of a undulating magnetic field was made by modifying a halbach array and staggering the interaction so that a constant change of intensity would yield a constant change to the flux density and change of field created a repelling effect that maintained enough opposing force that a track of coils pushed and repelling each other. This effect made a moving test bed fly above a lentz coil trak as the unit reached its effective interaction the lifted the test bed when it's forward movement reached 5mph and being held firmly between the upper and lower magnetic assemblies created a stif stable effect that levitated the test bed and remained at an air gap formed the lift with the coils assembled to the track and centered between magnet assemblies by the inline lentz coils that repel the magnetic field by its property of repelling what ever field is presented to the coil as long as it is a constantly changing field. This is the permanent magnet mag lev train, designed and invented by Dr Richard Post of UC Berkeley.
So, if you drop something in unobstructed air, it falls at the 'speed' of gravity, as he calls it. If you drop it in a close fitting pipe, it falls slower as it strikes the inside wall of the pipe as it falls. Wow. Thank you Great Pumpkin.
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share
A coworker said the copper pipe is like a generators winding but with only one wrap of wire and it's shorted out. Seems like a good way to look at it. I think he's correct.
When you spin copper wire spool by magnets you produce electricity, converting motion to current. Basically the same happens here, the acceleration from gravity is slowed because the motion is converted into current and that into heat because the power has no place to go
Seems like the rate at which the magnet falls must depend on the resistance of the copper, the strength of the magnet, and the relative size of the tube and magnet. I wonder if you could figure out the magnet strength given all the other information? Cool video.
All are true but calculating the Gauss of a magnet requires a lot of information that probably isnt reliable. The accepted way of measuring the strength of a magnet is to just use a Gaussmeter
@@logickedmazimoon6001 I agree it is not practical, and that a Gaussmeter is the way to go. Still, being able to estimate such things to reasonable precision is a lot of fun. You can even include the anticipated range of error in your calculation. If such things bring joy, then there are probably worse ways to spend a day or so... Thank you for taking the time to write back, it's very interesting to me to hear other people's thoughts.
@rsa4510 oh yeah, sure. No shame in just tryimg something. Size and shape and directiom of the magnet matter because of the magnetic flux. If the material "cuts" through the flux at a perpendicular angle, youll induce the maximum amount of voltage. Hint if you ever do end up doing something
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share
@@PhilipRussell You know, it's easy for someone (like myself) to scroll through TH-cam videos - particularly shorts - and occasionally leave sarcastic or critical comments. The time you have taken to post videos and teach students is highly commendable and I apologize for not being more thoughtful. The nature of the physical world is awe inspiring and those who attempt to help and teach others about the observable universe are underappreciated in my opinion. Good luck with your teachings!
Kiddies, if you missed it, Lenz's law states (approximately) that an induced magnetic field opposes the magnetic field that that induced it. Magnet moving by copper pipe cause current to flow in the pipe, current flowing in a conductor is surrounded by a magnetic field, that magnetic field drags on the magnet slowing its descent through the pipe. It is the physics that make an induction motor rotate.
Your demeaning introduction of "kiddies" speaks of arrogance and dismissal: it is most unwelcome in both polite conversation and youtube comment sections. Further, if you are unable to state a Law accurately and may only do so "approximately", perhaps it would be better to allow a more senior person to explain. Also, the inclusion of the second "that" in "that that" is superfluous. Finally, the second sentence contains no grammatical subject and is thus not capable of having meaning in English, and the "It" in the last sentence has no referent and so that last sentence is also meaningless.
I got your note. It is best that you stick with motors and leave thinking to us 59 year olds with 10 years university and competency. And by the way, there should be a "." after the "F" as well as the "U" as they are both abbreviations.
@@mgtowvalues Sorry, how about "fuck you ass wipe"? Is that a bit clearer? Jesus fucking Christ, as a university graduate, I never understood the contempt people have for educated people. You are perhaps the best argument I've encountered to date.
@@joeholland9593 Ah, the kiddie is getting upset, is he. You got called out for being a conceited prick and you don't like it. Too bad. Here I thought your arrogance was the best example of why people have contempt for the "edjucated".
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share
I tried this. The magnet slowly drops down through the non magnetic copper tube. Its like a stone dropped in the water slowly causing eddy currents to form around it. The magnet causes electrical swirling eddy currents to form in the copper tube.
The copper tube is not needed. The magnet will slow down when it slides down an aluminum angle stock at a 45 degree angle - that way people can see it slowly slide down.
There are many experiments to demonstrate lenz's law and the way that a magnetic field is produced to impede the falling of a magnet. The experiment can also be done with a very large linear magnet and a metal block falling
I liked the simplicity of the video. The slow mo section with the edit confused me because I am looking for genuine changes rather than cinimatic effects. I thought by lenzs law you were referring to the lens material used to see the magnet. The video induced my curiosity and that's making my brain remember lenzs law more that it would if you had spoon fed my brain.
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share
At first glance I through you were a monk with that dress and stick
😂😂😂😂
He is secretly a kung fu master
I thought hes a farmer 😅😂😂😂
That's what I felt
Same like bald Shaolin monks😂😂.
For those who didn't get it: (what he wanted to say was, though he didn't put it correctly)
When that magnet is dropped through the metal pipe, it takes more time to come down, compared to a non magnetic bar with same geometry and mass.
That's because of Lenz law, for the magnet, induced current in the metal pipe opposes the motion of magnet.( We know that a metal thing can turn into a magnet if rubbed to a magnet while if we move it near a metal thing a current will be produced in that)
Nice explanation! If I have it right, the dropping magnet induces an opposing field that resists it from dropping down, correct?
Kind of, except copper is not magnetic.
@@Me-nq4gz exactly, that's why it's fascinating
@@Maddie05007 yes definitely fascinating.
It you really break the concept down its opposite of the way a motor works. The magnet is passing through the copper tube. With a motor the copper winding is inside of the magnetic field.
Long ago I came upon some maintnance engineers troubleshooting a motor braking problem, they wanted to remove the dynamic braking resistors. For some reason I said NO. They looked at me like I didn't know what I was talking about. Needless to say I found the issue. I learned Lenz's law and CEMF last century. Thank You to all my electrical theory instructors.
Thankyou so much for going to the effort and the explanation of Herr Lenz,s law --Now I understand the magnetic field principle -- opposing the velocity of the dropping magnet!---REALLY APPRECIATE your lessons --I vaguely remember a similar demo by my physics lecturer---way back in 1967!
Woah…. I didn’t have a live demonstration of this when I first learnt it in 10th grade but having a demonstration of it back in 1967?? That’s crazy to think about!! I’m thinking of all the things your generation missed out on solely because there the Internet didn’t exist to show you these things… the juxtaposition must be hard to comprehend right?
I just read it in my book and you tube recommended me this video.✨Really it's fabulous to practical. ❣️Lots of love from India.🇮🇳♡
This reminds me of school because I learned nothing.
Lol same
Lmao
So true
Ditto
This is not about your lack of self discipline and curiosity, but go ahead, tell us you are stubbornly willfully arrogantly ignorant.
This didn't feel like a TH-cam Short, it felt like a TH-cam Long
Or a TH-cam WRONG
@@WILLYNOTWALLY bro its correct
Lenz's Law: Magnetic objects will fall slowly down a copper pipe if you are wearing a yellow raincoat.
And extra slow when next to the clever piece of film. It even reduces the pitch of the sound of the magnet hitting the copper tube.
My understanding exactly
😂😂😂
But only after you've been singing in the rain .over the rainbow .
Netter Beitrag😂
Was shown this rapid deceleration process --live demo back in 67 ----astute physics instructor at college ---still fresh in my astonished mind !
The polarity of indcued emf is such that it tends to produce current which opposes the change in magnetix flux that produces it
Current cannot oppose the mag etic flux that induced it! Induced Current produces an opposing magnetic field to that which induces the current! Don't mix your variables and confuse 😢 your physics professors here!
the magnet creates current in the copper tube while its moving then the current produces another magnetic field with the opposite direction, which negates the first magnetic field , slowing down the first field which produces less current, hence it is opposing production
Lenz's law states that the direction of the electric current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes changes in the initial magnetic field. It is named after physicist Emil Lenz, who formulated it in 1834.
I am concerned that you think your statement is helpful to a basically educated person. I saw a magnet, I saw a copper tube. You are talking about an electric current - I did not see that nor did Philip Russell describe that; you mention a changing magnetic field, and I am quite sure that the field generated by the magnet did not change, nor again did Philip Russell mention a changing magnetic field. So, you have inserted terminology not in evidence in the experiment and have thus explained nothing to someone who does not already understand Lenz' Law.
What
@@mgtowvalues😂💯❤️
@@mgtowvaluesSince the position of the magnet changes with time, the magnetic field also changes with respect to time for the copper tube, and by Faraday's law, an emf will be generated due to the change in magnetic field... This means an electric current will be generated in the copper tube, and the direction of the current is such that it opposes the direction of magnetic field (Lenz's law), and thus there is a force applied to the magnet by the copper tube, resulting the magnet to slow down while falling.... I hope u understood a little bit
@@Hyp3r_Wolf Thank you for your response, but unfortunately, it remains opaque. Did you mean: "Since the position of the magnet changes with time with respect to the copper tube, the magnetic field also changes"? In other words, it is unclear what "the magnetic field for the copper tube also changes [with reconstructed grammatical subject]" means. Does this mean that the magnetic field is for the copper tube and not for, say, itself? Or just is in general?
But more importantly, "there is a force applied to the magnet" - what type of force is this?
In other words perhaps, due to Faraday's law in generating an electric current via spinning iron and copper, do we need to drop a magnet or just drop any chunk of iron down the copper tube?
Also on a side issue, are you on board with the geo-dynamo theory?
Lenz’s law “whatever you drop, it’ll fall down” amazing 😂
Bro this is one of the funniest comments I've ever read, laughed immediately😂
At the speed of gravity, don't forget that part
😂😂😂
😂😂
@@gouvyfam speed of gravity is the most stupid and disturbing thing I heard today
For you to know, the movement of the magnet through the copper pipe, creates electric current thus an opposing magnetic field that breaks down the movement of the magnet, so it drops slowly.
Onw of the coolest displays or experiments showing this law.
While many of u will just ask where is Lenz law,but sir's example is used in various questions related to induced emf(for eg in JEE entrance exams in India) ,where we need to find out several factors like flux, emf induced etc,with some changes in the given scenario.
mereko electromagnetic induction bahuth pasandh hai
Wtf,why you want to insert JEE in everything? It is just a simple concept in Physics.
@@Anonymous-8080cool lgane ke liye bakchodi kr rha h
because we study this though . ..@@Anonymous-8080
@@Anonymous-8080 16-17 saal ke bache usko hi sab kuch mange hai 😂
Thank you for visualising 👍👍👍 the concept
Well done chacha love you from India 🇮🇳
😂 Chacha 👌
ताऊ हैं
@@syedhussainalishah1104 🤣😁
Haha
Chacha 😂😂Goddamn..
Wouldn’t you just have loved him as your science teacher at school , brilliant 👍👍😀
The speed of the magnet inside the pipe increases less and less rapidly. As the speed increases, there is a counterforce (opposing the weight) that increases at the same time. The increasing counterforce is caused by the interaction between the moving magnetic field of the magnet and the increasing magnetic field produced by the increasing current induced in the part of the pipe surrounding the magnet. This current (induced by electromagnetic induction) increases because the magnet goes faster and faster. After everything has reached a certain maximum value at the end of the pipe, the emerging magnet reaccelerates at the usual ``g`` of about 9.8 m/sec2, the electromagnetic counterweight not being there anymore.
I never thought I would learn science from a Shaolin monk.
He's a heavens gate survivor.
Oh he's not a monk😂😂..lol
He's not teaching it right
@@rickandmorty2361 very few people who have commented actually realize he explained nothing, and what he did say teaches people wrong.. it's much slower than gravity due to creating it's own electromagnetic field.
What did you learn? Because he explained nothing.
It went in to matrix mode when it approached the sheet.. that’s amazing
Lenzes law states that if a conductor is placed in a varing magnetic field an EMF(voltage) is induced in the conductor such that a magnetic field is produced in the conductor which opposes the direction of the external magnetic field.
Didn't get it, kindly keep it simple.
But why does that occur
The magnets movement creates an counteracting magnetic field, that brakes the movement. (That is if the movement is along a conductor, so an electric current and hence a magnetic field is induced.)
Lenz's law states that the direction of the current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it.
@@GovindaKumar-108 it can't get any more simplified. But understanding the effect is easily achieved by doing the same experiment yourself . It only requires the cobber- or aluminium tube and a strong magnet, small enough to pass through. Peace
Hii,
I'm from India
And you are my favourite teacher
Very well teaching ❤❤
Is this a joke
It's how some braking systems work. Common on roller coasters. Contactless braking
Wow! Thanks sir! Make more like this ☺️
Sure 👍We will.
Great work sir! great work love your content 😍🙏 please keep more of these coming!😍🙏Thank you for this Video! 🔥🇮🇳... really enjoyed watching 🔥🇮🇳
looks like he never missed an episode of Alfred Hitchcock Presents.
If I could like this 100 times...
Bedankt
Ye Dada toh gjb hai yarr❤❤
Why make it slowmo when you’re trying to show that it slows down on its own??
At normal speed you could see the field and the tumbling very well. This is a demonstration of the effect of Lenz's Law we are producing another video on the explanation of Lenz's Law.
@@PhilipRussell Maybe explain first, then demonstrate?? You used a dumb approach to teach here, as you can see by all of the comments…
@@joneill63 it wasn’t a dumb approach..people who come here to learn will learn
@@PhilipRussell just another Brit who thinks he sounds smart with his accent
@@joneill63 I studied science and this is best approach ... Practical comes first then you dont need to cram theory to get pass in exam
You have a magnificent voice.
That was dumb as s*** didn't explain anything
Lenz's law always gets a thumbs up from me. I have no idea why.
Bwahaha
When you drop the magnet down the copper pipe, the falling magnet induces an electric current into the walls of the pipe. The current induces a magnetic field that opposes the the decent of the falling magnet. So, the magnet then falls at a much slower speed than a non magnet.
Score : 6/7 . feeling good after solving these questions .
Because of you i scoring 60-70 in mocks in physics
This is what a proper Shorts installment should be, I've learned something. Yay.. 👍😃👍
Glad you enjoyed it and learnt something. I am doing more 1 minute science lessons because this is an easy way to learn and have some fun. If you subscribe and click the bell you will get to know as I release more videos.
“Stayed tuned. In the next episode we will be demonstrating how slow sloths move by filming a sloth crawl in slow motion.”
Lenz's law states that the direction of the current induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it.
@@musicpipe yeah
That's how it works it wasn't a slo mo
What planet is this your on master
This is not a "slowed down" Video-Clip. Ask your physics teacher what it's about. ( That is : If you know where your local school is .....
Excellent demo of Lenz's Law
Induced EMF is such that it opposes the cause which produces it. Thus produces an opposing magnetic field that produces a repelling force ie.the net acceleration on the magnet is reduced than that in a normal free fall.
Loops of magnetic field really amazing 😍
Nice video, Phillip! I subscribed! 🤘😁🇺🇸
“This is Lenz’s law. If I take a magnet and drop it, it falls”
🤔😂
😂😂😂😂
at a slower rate, dummy.
If you let it fall through a copper tube eddie currents will resist it from falling and it slows down the fall. Anti-gravity in poor man's mind.
It slows down dude it's real this is used in many devices
Okayyyyy well understood from you👏 👌
Hopefully some young people will see this and become curios about the science behind this, a career awaits them.
Its Actuallly Generating Electricty. Can see better if Dropping through a long coil of copper wire. What makes it a little strange is, copper is not Magnetic, is what make Motors work.
"Coppah chewb...."💯
But why'd it fall ?
@@illfather7066simply, gravity! The magnetic field induced in the copper tube that tried to oppose the motion of the magnet (which is basically what Lenz’s law is) simply wasnt strong enough in that time instant to completely stop the motion of the magnet. It’s not shown here very well (better off to say that it’s impossible to comprehend that without the comment section) but the induced magnetic field of the copper tube DID slow down the motion of the magnet (but not by very much to completely oppose the magnitude of gravity)
It tells us the the direction of current induced in a loop right...
But this is Faradays law know?
Lenz's law came out just after Faraday published his law. Faraday didn't realise that the direction changed things and Lenz did - so Faradays Law, Lenz's Law - take your pick. I chose Lenz.
I Too choose lenz 😁
The copper reacts with the magnet and alters the direction of charge I believe and it causes it to bounce off of little charges of repulsion back and forth but really fast. Something that only happens with copper tubes and magnets though. This clip actually shows it pretty well with the film and a disk magnet cause you can see it sliding off each magnetic momentary "shelf" basically. I've seen it done with a magnetic ball and i wasnt able to see that part of the affect.
@@PhilipRussell why did you say it falls at the speed of gravity? This video teaches misinformation.. it also explains nothing about the interaction between the copper and magnet, and the electromagnetic field.. do you know how a conventional dynamo works? Or an electric motor with copper windings? Just wondering.
@@mitchellcastillo2858 considering your comment was a month ago you've probably learned how a dynamo works by now... this doesn't show anything. Falls much slower than gravity.
Professor Snape has transferred from Hogwarts to teach magnetism.
Sir I am from India but I learn concepts from you sir love you sir❤❤❤❤❤
NP and SP crumbles as it pass through the copper tube that is why the cylindrical magnet canot passthrough in straight direction. The inside diameter or the tube is the trick.
Love You Daddu ❤️
At first, I thought the man was from shao-lin, seeing the staff and the costume... 😅
Mee tooooo
It's not a monks or an evil genius outfit, but a Howie Lab coat. This better than an ordinary lab coat, because it does right up to the neck. My students wear white and I wear Gold so they can easily see me in the lab.
Filmed from his padded cell in Broadmoor Hospital.
I used to explain the same phenomenon with 3 different pipes. Plastic, GI and Copper. Now i can try to show with one pipe and magnetic film.loved it.
Lenz law
When you move bar magnet close to coil it repel and when you put back it attracts.
Amazing ❤
I’ve never been so disinterested in something in my life.
Why it slowed a lot at the film! 🤔
Ohh! Lenz's law
LoL 😂
Lenz had way too much time on his hands not unlike this guy.
Awesome Visualization
My sincere thanks for sharing it.
“Gravity” the mysterios force...
You should have been impressed by how the magnet is slowed down, due to currents induced in the cobber-tube surrounding it
The variation of the magnetic field generates a current that generates antother magnect field the slow down the magnet
@@sapodoviolao9102 It's called INDUCTION. The currents get INDUCED. Why use incorrect terms ?
I’ll be….science damn it!
''son kills Father ''_ lenz law
Alakh sir OP😁
Completely life changing peace of information… incredibly excited about integrating this magnetic phenomenon into my daily commute or something 🤔
Well i respect you very much sir for showing this as an experiment, i mean I've studied this during my entrance exams, only theoretically but this was fun watching it happen.
Jokes apart, not everyone who watches shorts can understand this!✌
👍👍👍👍🙏
"at the speed of sort of gravity, stfu" stupid tik tok
If the North Pole of the magnet move towards the coil the magnetic flux linked with the coil changes but this is possible only if the current is in the counter clockwise direction..
The dropping magnet induced a current in the copper pipe. Acc. to *Lenz's Law* the induced current opposes any change in itself. So when the magnet drops the magnetic field lines increase so the copper tube also gives out some field to counter those increasing magnetic filed lines.
I'm Always fascinated with this one
This reminds me when i took the broken speedometer of my fathers car to my summer work place of military engineers and had like a competition about how it works. I had just learned Len's law in school and had an A in physics to I had figured it out quite easy. It is basically that any electric conductive material passing through changing magnetic field will induce a current and an opposing magnetic field. Their is a trick with you hand to figure out what direction the field will be. In the speedometer there is a rotating magnet inside a wheel with spokes. The faster it goes the harder the copper wheel wants o follow but a clock type spring is hindering to go around and instead show ho fast he magnet is spinning.
I asked my physics teacher ''sir what's lenz law" our chapter is going on and this topic is there he said dφ/dt....he didn't even said what it means(even what he said is neither here nor there)...on asking for the definition he said it is not asked in xam.... don't bother
Such a lucky one is me.....
Can you calculate that acceleration?
Some graphical animations like arrows showing directions of field and current could have enhanced the effectiveness of this demonstration. Still a very interesting experiment.
I just came across a question related to this exact same theory a few minutes ago. Now I'll get these types of questions right
a clever peace of material, really how bout let us in on what kind of material it is .
The material is Green Magnetic Field Viewing Film bought from
www.amazon.co.uk/gp/product/B000UV6ZPS/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1 You can see a video on the magnetic film at magnetic film paper th-cam.com/video/xYKH5u0JYq8/w-d-xo.html
Nice illustration. 😌
finally something new, so many of those copper tube videos, everyone is like "hey look, it drops slower cause of magnetic field" over and over for so many years. Getting tiring, but this is nice! Now to measure the current at certain points of the tube would be even more next level :D
The fall of material down the tube is meeting resistance to its interaction of the copper die pole resisting the change in polarity as the reluctance to change creates work so the magnet rate of descent produces a net loss of speed toward earth. This is an Eddy current brake for all intents.eddy currents are used in breaking a movement of some device by using a changing of polarity +/-/+/- etc. to thicken the non ferris material and increase the flux density can increase this braking effect as the interaction of flux density with a less than saturated copper tube gets the maximum effect when combined with a reduced air barrier from the surfaces of the id od of respective tube and disc. I don't recall lentz as the one with the formula used to define the interactions but he was a brilliant observer. A project that used lentz coils for the repelling of a undulating magnetic field was made by modifying a halbach array and staggering the interaction so that a constant change of intensity would yield a constant change to the flux density and change of field created a repelling effect that maintained enough opposing force that a track of coils pushed and repelling each other. This effect made a moving test bed fly above a lentz coil trak as the unit reached its effective interaction the lifted the test bed when it's forward movement reached 5mph and being held firmly between the upper and lower magnetic assemblies created a stif stable effect that levitated the test bed and remained at an air gap formed the lift with the coils assembled to the track and centered between magnet assemblies by the inline lentz coils that repel the magnetic field by its property of repelling what ever field is presented to the coil as long as it is a constantly changing field. This is the permanent magnet mag lev train, designed and invented by Dr Richard Post of UC Berkeley.
Beautiful demo
Very impressive filming 👍
So, if you drop something in unobstructed air, it falls at the 'speed' of gravity, as he calls it. If you drop it in a close fitting pipe, it falls slower as it strikes the inside wall of the pipe as it falls. Wow. Thank you Great Pumpkin.
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share
A coworker said the copper pipe is like a generators winding but with only one wrap of wire and it's shorted out. Seems like a good way to look at it. I think he's correct.
When you spin copper wire spool by magnets you produce electricity, converting motion to current. Basically the same happens here, the acceleration from gravity is slowed because the motion is converted into current and that into heat because the power has no place to go
Philip kicks ass!
Seems like the rate at which the magnet falls must depend on the resistance of the copper, the strength of the magnet, and the relative size of the tube and magnet. I wonder if you could figure out the magnet strength given all the other information? Cool video.
All are true but calculating the Gauss of a magnet requires a lot of information that probably isnt reliable. The accepted way of measuring the strength of a magnet is to just use a Gaussmeter
@@logickedmazimoon6001 I agree it is not practical, and that a Gaussmeter is the way to go. Still, being able to estimate such things to reasonable precision is a lot of fun. You can even include the anticipated range of error in your calculation. If such things bring joy, then there are probably worse ways to spend a day or so... Thank you for taking the time to write back, it's very interesting to me to hear other people's thoughts.
@rsa4510 oh yeah, sure. No shame in just tryimg something. Size and shape and directiom of the magnet matter because of the magnetic flux. If the material "cuts" through the flux at a perpendicular angle, youll induce the maximum amount of voltage. Hint if you ever do end up doing something
I like how they went to slow motion video to demonstrate the magnet actually falling slowly. Not confusing AT ALL!!
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share
@@PhilipRussell You know, it's easy for someone (like myself) to scroll through TH-cam videos - particularly shorts - and occasionally leave sarcastic or critical comments. The time you have taken to post videos and teach students is highly commendable and I apologize for not being more thoughtful. The nature of the physical world is awe inspiring and those who attempt to help and teach others about the observable universe are underappreciated in my opinion. Good luck with your teachings!
Thanks professor.
Kiddies, if you missed it, Lenz's law states (approximately) that an induced magnetic field opposes the magnetic field that that induced it. Magnet moving by copper pipe cause current to flow in the pipe, current flowing in a conductor is surrounded by a magnetic field, that magnetic field drags on the magnet slowing its descent through the pipe. It is the physics that make an induction motor rotate.
Your demeaning introduction of "kiddies" speaks of arrogance and dismissal: it is most unwelcome in both polite conversation and youtube comment sections. Further, if you are unable to state a Law accurately and may only do so "approximately", perhaps it would be better to allow a more senior person to explain. Also, the inclusion of the second "that" in "that that" is superfluous. Finally, the second sentence contains no grammatical subject and is thus not capable of having meaning in English, and the "It" in the last sentence has no referent and so that last sentence is also meaningless.
I got your note. It is best that you stick with motors and leave thinking to us 59 year olds with 10 years university and competency. And by the way, there should be a "." after the "F" as well as the "U" as they are both abbreviations.
@@mgtowvalues Sorry, how about "fuck you ass wipe"? Is that a bit clearer? Jesus fucking Christ, as a university graduate, I never understood the contempt people have for educated people. You are perhaps the best argument I've encountered to date.
@@joeholland9593 Ah, the kiddie is getting upset, is he. You got called out for being a conceited prick and you don't like it. Too bad. Here I thought your arrogance was the best example of why people have contempt for the "edjucated".
Illustrate a magnet falls slower through a copper tube BY SLOWING DOWN THE VIDEO? Brilliant.
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share
@@PhilipRussell Excellent. Thank you.
The special piece of paper is a magnet paper. It shows where magnets are behind a material.
Oh capital! Indeed my Right Honorable Friend, truly spot on
Thank you so much sir 🌺
I tried this. The magnet slowly drops down through the non magnetic copper tube. Its like a stone dropped in the water slowly causing eddy currents to form around it. The magnet causes electrical swirling eddy currents to form in the copper tube.
Thank u tau ji . Love from bharat 🇮🇳🇮🇳
This is actually super cool
If only the information here can make me not constipated, I will appreciate Lenz law.
very cool content 👌 😎 👍 👏
The copper tube is not needed. The magnet will slow down when it slides down an aluminum angle stock at a 45 degree angle - that way people can see it slowly slide down.
There are many experiments to demonstrate lenz's law and the way that a magnetic field is produced to impede the falling of a magnet. The experiment can also be done with a very large linear magnet and a metal block falling
I liked the simplicity of the video. The slow mo section with the edit confused me because I am looking for genuine changes rather than cinimatic effects. I thought by lenzs law you were referring to the lens material used to see the magnet. The video induced my curiosity and that's making my brain remember lenzs law more that it would if you had spoon fed my brain.
This was the first of two videos I created for my students. They asked for the slo-mo as the magnet moved too fast through the viewer to see what was happening. The first which you watched was a demo of what happens. In the other video the explanation the Law is explained, and the video of the magnet is at full speed th-cam.com/users/shortsSVVK0xoEeNk?feature=share