great work sir. i did this practical as a project for my senior year with some modifications of my own including a magnetized pendulum. i got the inspiration from your video. thanks again. appreciate your work and keep it up.
Very very good explanation and very good way of explaining the concept. I cleared all my concepts of braking and the direction of current produced due to the eddy current. Many many thanks sir for clarifying my concept.
amazing. I though I know everything about simple experiments. This is like music to me I would listen while sleeping. What is amazing is how effective the braking is.
Very cool. Both electromagnetism courses I've taken in college so far seem to acknowledge Eddy currents, but not discuss them at all (probably because of their difficulty to calculate). Thanks for the clear demonstration.
Great video. For clarification: when he says “opposing” magnets: it means opposite poles so the magnets are attracted to each other. Opposites attract. I made the mistake of placing the magnets so they repelled each other. That doesn’t create an Eddy Current.
they are used in breaks for high speed trains and rollercoasters actually! so your idea isnt that unreasonable. i think one problem would be that for a car, you wouldnt want a dead battery to mean no breaks if its an electro magnet. (i think permanent megnets would be too much extra weight). also a car break with this mechanism would "feel" different especially with low speeds while parking for instance. the sharp breaks of friction based technology probably make for tighter control. its a fascinating idea though. i deffinetly wonder if its been tried for cars.
@@kettenschlosd Oh cool! Thanks for sharing. And maybe they can create a hybrid system, magnet brakes with faster speeds like on the highway and then it switches to a mechinal one at mechanical half way. Or if no electromagnetic power, just defaults to your mechanical brakes. Regardless, this is cool technically and never knew that roller coaster utilize this
Hybrid and electric cars use this method in a way… rather than just a brake disc between a magnet though, they use the electric motors they already have, and pull power from the motors, turning them into generators. The copper coils of the motor moving in the magnetic field of the motor do exactly this, but instead of the current going in a loop and being wasted as heat, the current can be dumped back into the battery, recapturing a good percentage of the power that was used to accelerate the vehicle in the first place. Electric trains do this too (and probably slightly more efficiently), but they dump the power back into the train network for other trains to use.
The red current loops are drawn incorrectly. Half of the loop must be outside the magnetic field. This is required so that the Lorentz force stops the pendulum (else the force on half of the current loop cancels the force on the other half). The current loops form around the boundary because they encircle the change of flux, which is at the boundary of the magnetic field.
I should have been more careful with drawing the eddy currents. Back then I had a difficult filming arrangement and it was hard to concentrate on what I was saying, what I was drawing, and what I was filming.
How does a battery operated magnetic pump work? There must be an aluminum showing between the coupled magnets, so how do they get around the Eddie current problem and keep their efficiency?
@@electricandmagneticfields2314 Oh man that would make a great video! Basically you can magnetically couple a motor to a shaft radially through a housing so there are no shaft seals which is a huge advantag for a lot of reason. However, there are a few tricks to maximize coupling and minimize eddie currents I'm still trying to understand. Advanced Diver Propulsion Vehicles also use them since shaft seals are the biggest risk to flooding a housing: ruclips.net/video/eufuhWX-ZjM/видео.htmlsi=SGjZJTR_Idv97WEf&t=19 ruclips.net/video/IAkxS1xVraw/видео.html
Thanks for the kind comments. The calculations would probably have to be done numerically. First using Faraday's law to determine the induced currents and then F = IdLXB to get the force on the paddle.
@@electricandmagneticfields2314 thank you but how would the number of oscillations, come into play in the formula. As I'm really curious to how eddy current is produced from the pendulum motion but want to know how to quantify my observation. If you could help me, I would really appreciate it.
Yes, but it is expensive. Here are the links www.pasco.com/products/lab-apparatus/electricity-and-magnetism/em-8642 www.pasco.com/products/lab-apparatus/electricity-and-magnetism/em-8618 www.pasco.com/products/lab-supplies/clamps-rods-and-stands/me-9355 I had these items available. If I had to purchase them I would have built the apparatus.
If the eddy current results in a magnetic field that acts perpendicular to the motion of the pendulum, then why does it slow down? Wouldn't it need to experience a force in the opposite direction to the way its travelling in order for it to slow down? And does the magnetic field due to the eddy currents cancel out with the magnetic fields due to the bar magnets?
The force on the eddy current from the permanent magnet is F =Idl x B, so perpendicular to the eddy current and the the permanent B field. Superposition holds so the magnetic field at some point in space is the same of the tow magnetic fields. Just like it would be if you had two bar magnets.
very simply put: when it swings by it generates energy in the metal, and that energy makes a magnetic field which kinda makes it attract to the aluminium so the more movement the more energy is generated the stronger the field is and also the hotter the metal gets
Torque is the cross product between the force and the distance vector from the axis of rotation to the location where the force is being applied, t = F x r study.com/academy/lesson/what-is-torque-definition-equation-calculation.html
There are still some eddy currents flowing, but they are greatly reduced because they cannot flow between the thin aluminum strips because of the air gaps. The only eddy currents that can flow are in the thin aluminum strips.
The other two pendula are closed "loops" (I put loops in quote marks because the first one is a solid) and thus a current can flow in the bob (the swinging thing on the end of the pendulum). In the third pendulum, there isn't any connection between the ends of each "prong" (if that makes any sense) and thus no current can flow within the bob, so no damping.
I understand the direction that the magnetic field is induced but how does this lead to the pendulum stopping, i.e. how is a force created in he opposite direction to the motion?
You can think of the pendulum as becoming a magnet. So for the two permanent magnets and the magnet representing the pendulum you would have, [S permanent magnet N] [N pendulum S] [S permanent magnet N] So as the pendulum tries to swing between the two permanent magnets it is being repelled by the two permanent magnets and hence slowed/stopped.
The magnet was a variable gap magnet with two one inch (2.54 cm) diameter neodymium magnets, I am not sure what the field strength was. The aluminum pendulums were about 2 mm thick.
can temperature equivalent to 1000 degree c be produced by the help og eddy currents???? if so what should be the strength of the magnet used? can iron be used for the same???
I have never looked at calculating how much heat is produced. I would have to think for a while as to the best way to calculate the heating. The heating would be directly proportion to the total change in flux with respect to time. So the larger the magnet and faster the motion the greater the heating.
Yes it can be done. From the changing magnetic flux caused by the motion you can determine the electric field intensity induced in the aluminum. Then from the resistivity of the aluminum you could determine the resistive heating. Alternatively, since the solid aluminum pendulum stopped immediately upon entering the magnetic field region, the kinetic energy the pendulum had would have been converted into heat--a simpler way to get an estimate of the heating.
I'm not sure what is practical using a mechanical motion to produce induction heating, but using an AC signal to generate the changing magnetic flux is how induction furnaces operate, en.wikipedia.org/wiki/Induction_heating
Hi Michael!, I have a question... If there's a steady neodymium magnet and I horizontally slide an aluminum strip considerably close to it, the strip will slow down till it stops or it will just continue to slide but a bit slower?
Interesting question. As it slows down, the eddy currents will get smaller and smaller, but they should still be there and exert a force on the bar till it stops. But it won't actually be held in place by the magnet, so any additional outside forces and the bar will move. That is why when used as the brakes for a roller coaster magnetic brakes can't be used as block brakes so there has to be an additional brake to stop/lock the roller coaster. en.wikipedia.org/wiki/Brake_run physics.gu.se/LISEBERG/eng/magn_brakes.pdf
Please let me propose the following model to describe the pendulum position: for some positive constants {a, b}, the angle respect to the vertical x(t) should follow, in order of achieving a finite extinction time, something of the form: x''+ a sgn(x') sqrt(|x'|) [sqrt(2)/4 + |x'|^(3/2)] + b sin(x) = 0 hope you could try it matching the constants with experimental results, I am quite sure you aren't going to be dissapointed.
This is the magnet, www.pasco.com/prodCatalog/EM/EM-8618_variable-gap-magnet/ and these are the paddles www.pasco.com/prodCatalog/EM/EM-8642_magnetic-force-accessory/index.cfm
hey sir , i have lots of questions 1)can i use 10mm x 1mm neodymium magnet if not plz justify . 2) which type of sheet you have used steel or aluminium or stain less steel. 3)how you have attached the magnets at that object which you have used . 4)way you have attached the magnets in brief . plz justify beause i want to do it practically plz
1. yes, but the more magnetic flux the stronger the braking. 2. the pendulums were aluminum 3. Not sure of the question, the magnet I used was this one www.pasco.com/prodCatalog/EM/EM-8618_variable-gap-magnet/
Why does braking occur? I can;t understand why the current generated leads to the braking ( or the dampening of the oscillations, if i may say ) ? I understood everything else in this video, just this fact. Please help.
+Kartikey Misra A current will generate a magnetic field. (See this video demonstration of a current turning a coiled wire into a magnet ruclips.net/video/s-qHfqYAvaw/видео.html) So the induced current in the aluminum paddle will generate a magnetic field essentially turning the aluminum paddle into a magnet. It is the interaction between the induced magnetic field in the aluminum paddle and the permanent magnet that does the braking.
Hello professor Melloch, My name is Rich and I was wondering if you could give me an opinion on a possible solution to a problem I’m having with a set of carburetors that would involve eddy current damping.
The problem I’m having seems to be caused by the vacuum operated parts of the carbs lifting too early and fluttering. When this occurs, the engine quickly loses power and stalls, probably from an over rich condition. Here is a video of that happening; it should start at an appropriate time index. There is a white dot on the #3 throttle slide ( 3rd from the left), it bounces rapidly as the throttle is opened. ruclips.net/video/VtmbGLGt3qw/видео.html What I’m wondering is if I could put a small magnet(s) in the plastic throttle slide ears as a way to damp out the fluttering. Not sure what the carbs are made of - Aluminum or Zinc or some alloy in between. This video starts at a point showing the slide suspended in the carb body. ruclips.net/video/6sd-YwEv0Jo/видео.html I think the fluttering is caused by the air intake pulse on this 4 stroke engine and a lack of slide damping. I would appreciate your opinion as an expert in this field. Thanks
Sir , I think you r wrong , what you r trying to say is that , electro magnetic damping happens due to change in magnetic field , well it's wrong . Let me explain , change in magnetic field produces induced electric filed.Change in magnetic flux or Eddy current causes electro magnetic damping . There is a difference .
Sir, this is literally the best video explaining Eddy currents I have seen so far. Really appreciate that. Good work!
Absolutely ryt😁😘😘
@@sunnymourya8303 Thank you!
Finally I got it....thank you so much sir... seriously we can understand physics practically more
Thanks from INDIA
You are welcome!
THIS SHOULD BE THE METHOD OF TEACHING NOT THAT THEORY, THANX SIR
you need to learn both theory and practical
wow sir it was a concept clearing video..............love from INDIA...............
Excellent! You completely cleared my concept of eddy currents.Thank you very much!
You are welcome!
You are truly wonderful. I never understood the topic in the Arabic language, so I turned to you and the explanation amazed me
Thanks for letting me know. I am glad the video helped you!
great work sir. i did this practical as a project for my senior year with some modifications of my own including a magnetized pendulum. i got the inspiration from your video. thanks again. appreciate your work and keep it up.
Very very good explanation and very good way of explaining the concept. I cleared all my concepts of braking and the direction of current produced due to the eddy current. Many many thanks sir for clarifying my concept.
You are welcome!
Teaching method is super awesome 👏. I understood the concept thoroughly.
Love from INDIA 🇮🇳 ✌️
amazing. I though I know everything about simple experiments. This is like music to me I would listen while sleeping.
What is amazing is how effective the braking is.
Excellent demonstration that acts like a bridge between the book and the mind.
Excellent sir
Thank you for the nice video
Very cool. Both electromagnetism courses I've taken in college so far seem to acknowledge Eddy currents, but not discuss them at all (probably because of their difficulty to calculate). Thanks for the clear demonstration.
Exellent for explain.......Thank you..so much...you are No.1
merci ca repond a des question depuis des année , oui la meilleur
je vous en prie
Thanks! Really needed it.. :)
Wow sir your explanation with specified experiment help me lot ,to understand the concept of eddy current. Thanks for your help.
Very clear thus too nice....
Amazing video! I've understood the concept very well all thanks to you :)
thank u very much sir , from Iraq
tres belle demonstration ,bravo ca repond a mes question
It's really good. .🔥.I know this concept very well Sir..
Thank you
Eng.tabarak.sahib
واخيرا لگيك جماعه كتيب 😅💪💪💪
#المهندس 😌
@@حسينكريم-ض2د @ebbhdhdhh
تعال انضم للقناة هايه
Thank you for this clear explanation!
You are welcome!
nice video it' cleared my all doubts thank you sir,!!! 😊
Best best best
Thanku so much 🥳🥳😜😜best explaination
You are welcome!
Wow this finally made sense, and I can see I am not the only one. Thanks :)
Awesome video
Very well explained!
Thank you
eng.Hussain 💪💪
Great video. For clarification: when he says “opposing” magnets: it means opposite poles so the magnets are attracted to each other. Opposites attract. I made the mistake of placing the magnets so they repelled each other. That doesn’t create an Eddy Current.
That is correct. I should have put an N on one and an S on the other to make it clear.
Thank you, sir, it was so confusing till I watched this video.
Best explanation!
well demonstrated... n well explained...
wonder y this video has received only 50 likes...
thnx a lot....
Great explanation, though I'm wondering where in tarnation I can get those aluminium parts and the magnet ...
www.pasco.com/products/lab-apparatus/electricity-and-magnetism/magnetic-fields/em-8618
www.pasco.com/products/lab-apparatus/electricity-and-magnetism/magnetic-fields/em-8642
@@electricandmagneticfields2314 Thanks so much! Really helped a lot!
Awesome video.
Thank you very much sir.
You are really doing great...
Really Nice demonstration! THANK YOU sir, !
Thank you, thank you, thank you.
You are welcome!
Very Helpful...thank u
Really interesting
Loved it
Best video thanks
Thank you for your comment!
Underrated 👍
Thank you sir very nicely explained!
Sounds dumb but can we create car brakes with this?
they are used in breaks for high speed trains and rollercoasters actually! so your idea isnt that unreasonable. i think one problem would be that for a car, you wouldnt want a dead battery to mean no breaks if its an electro magnet. (i think permanent megnets would be too much extra weight). also a car break with this mechanism would "feel" different especially with low speeds while parking for instance. the sharp breaks of friction based technology probably make for tighter control.
its a fascinating idea though. i deffinetly wonder if its been tried for cars.
@@kettenschlosd Oh cool! Thanks for sharing. And maybe they can create a hybrid system, magnet brakes with faster speeds like on the highway and then it switches to a mechinal one at mechanical half way. Or if no electromagnetic power, just defaults to your mechanical brakes. Regardless, this is cool technically and never knew that roller coaster utilize this
@@kongol5036 Did you hear about regenerative braking?
Hybrid and electric cars use this method in a way… rather than just a brake disc between a magnet though, they use the electric motors they already have, and pull power from the motors, turning them into generators. The copper coils of the motor moving in the magnetic field of the motor do exactly this, but instead of the current going in a loop and being wasted as heat, the current can be dumped back into the battery, recapturing a good percentage of the power that was used to accelerate the vehicle in the first place. Electric trains do this too (and probably slightly more efficiently), but they dump the power back into the train network for other trains to use.
Thank you very much best explanation
You are welcome!
Sala this topic mere dimag me aa nahi raha tha.... thanks bro... understood very easily 😁
The red current loops are drawn incorrectly. Half of the loop must be outside the magnetic field. This is required so that the Lorentz force stops the pendulum (else the force on half of the current loop cancels the force on the other half). The current loops form around the boundary because they encircle the change of flux, which is at the boundary of the magnetic field.
I should have been more careful with drawing the eddy currents. Back then I had a difficult filming arrangement and it was hard to concentrate on what I was saying, what I was drawing, and what I was filming.
u r graet ...it clear all my doubts. .thanku
Super👌
How does a battery operated magnetic pump work? There must be an aluminum showing between the coupled magnets, so how do they get around the Eddie current problem and keep their efficiency?
I don't know anything about magnetic pumps. It is something I will look into and maybe there is a potential video there!
@@electricandmagneticfields2314 Oh man that would make a great video! Basically you can magnetically couple a motor to a shaft radially through a housing so there are no shaft seals which is a huge advantag for a lot of reason. However, there are a few tricks to maximize coupling and minimize eddie currents I'm still trying to understand. Advanced Diver Propulsion Vehicles also use them since shaft seals are the biggest risk to flooding a housing:
ruclips.net/video/eufuhWX-ZjM/видео.htmlsi=SGjZJTR_Idv97WEf&t=19
ruclips.net/video/IAkxS1xVraw/видео.html
@@peteabdu9179 Thanks!
Great Video. Well explained
Just wanted to inquire whether there is a formula to calculate the magnetic damping caused by eddy's current.
Thanks for the kind comments. The calculations would probably have to be done numerically. First using Faraday's law to determine the induced currents and then F = IdLXB to get the force on the paddle.
@@electricandmagneticfields2314 thank you but how would the number of oscillations, come into play in the formula. As I'm really curious to how eddy current is produced from the pendulum motion but want to know how to quantify my observation.
If you could help me, I would really appreciate it.
@@electricandmagneticfields2314 how do you determine current using faradays law
That metal grinding sound.......unnerves me and my students 😂😂........
But otherwise thanks for an excellent demo
You are welcome, sorry about the grinding sound.
But will there be tiny eddy current loops in the bars of the open slots?
yes and so there is some braking that occurs just no where near as much as the solid paddle.
Nice
you are perfect. thank u so much for this
You are welcome!
Thanks a lot sir! This helped me a lot :)
#احمد_كتيب
💪💪💪
Well ,explained.
Can this demonstration equipment be purchased? My colleagues want one. Thanks 🙂
Yes, but it is expensive. Here are the links
www.pasco.com/products/lab-apparatus/electricity-and-magnetism/em-8642
www.pasco.com/products/lab-apparatus/electricity-and-magnetism/em-8618
www.pasco.com/products/lab-supplies/clamps-rods-and-stands/me-9355
I had these items available. If I had to purchase them I would have built the apparatus.
If the eddy current results in a magnetic field that acts perpendicular to the motion of the pendulum, then why does it slow down? Wouldn't it need to experience a force in the opposite direction to the way its travelling in order for it to slow down? And does the magnetic field due to the eddy currents cancel out with the magnetic fields due to the bar magnets?
The force on the eddy current from the permanent magnet is F =Idl x B, so perpendicular to the eddy current and the the permanent B field. Superposition holds so the magnetic field at some point in space is the same of the tow magnetic fields. Just like it would be if you had two bar magnets.
What is that rig called?
I don't understand anything you are saying, but it's pretty interesting.
very simply put: when it swings by it generates energy in the metal, and that energy makes a magnetic field which kinda makes it attract to the aluminium so the more movement the more energy is generated the stronger the field is and also the hotter the metal gets
Got it, thanks!
Could the effect be used as a drive coupler, would the torque be transferred effectively?
wow! Excelent !
Nice Presentation. Gives a thorough concept on eddy current braking. Can we use the same principle for generating torque? Please advise!
The force is resulting in a torque on the pendulum.
Thanks for your reply. Are there any formulae for calculating Torque? If so please share!
Torque is the cross product between the force and the distance vector from the axis of rotation to the location where the force is being applied,
t = F x r
study.com/academy/lesson/what-is-torque-definition-equation-calculation.html
اول عراقي طالب سادس تطبيقي مر من هنا 🤟
انا الثاني هههههه
اني ثالث 😌😅
هلا بيكم 🤘😅
Thank You so much
You are welcome!
So this can also generate a good amount of currrent
THX . I,m from IQ (IRAQ)
How could someone get these tools?
www.pasco.com/products/lab-apparatus/electricity-and-magnetism/magnetic-fields/em-8618
www.pasco.com/products/lab-apparatus/electricity-and-magnetism/magnetic-fields/em-8642
Helps alot
Awesome application............
thank you so much sir
You are welcome!
what is the stand you used to hold plates is there any other alternative
I actually purchased these parts,
www.pasco.com/prodCatalog/EM/EM-8642_magnetic-force-accessory/index.cfm
This is so helpful. Thanks sir.. I have just one question. Can you explain once more why the eddy current can't flow in the third pendulum?
There are still some eddy currents flowing, but they are greatly reduced because they cannot flow between the thin aluminum strips because of the air gaps. The only eddy currents that can flow are in the thin aluminum strips.
Michael Melloch
thanks a lot sir
You are welcome!
The other two pendula are closed "loops" (I put loops in quote marks because the first one is a solid) and thus a current can flow in the bob (the swinging thing on the end of the pendulum). In the third pendulum, there isn't any connection between the ends of each "prong" (if that makes any sense) and thus no current can flow within the bob, so no damping.
sir what can we use as a non conducting material for this project instead of your third one?
I understand the direction that the magnetic field is induced but how does this lead to the pendulum stopping, i.e. how is a force created in he opposite direction to the motion?
You can think of the pendulum as becoming a magnet. So for the two permanent magnets and the magnet representing the pendulum you would have,
[S permanent magnet N] [N pendulum S] [S permanent magnet N]
So as the pendulum tries to swing between the two permanent magnets it is being repelled by the two permanent magnets and hence slowed/stopped.
where did you get the pendulum from , website or shop
Here is a link to where you can purchase the pendulum www.pasco.com/prodCatalog/EM/EM-8642_magnetic-force-accessory/index.cfm
can you please tell me the strength of the magnet used ,thickness of metal sheet and the amount of heat it produced
The magnet was a variable gap magnet with two one inch (2.54 cm) diameter neodymium magnets, I am not sure what the field strength was. The aluminum pendulums were about 2 mm thick.
thnxx...
Is the kinetic energy from the paddle converted into thermal energy?
yes, from the eddy currents flowing in the paddle, i squared R.
Thank you!
Thanks a lot...Sir😊
Can I get pdf of this experiment
For my investigation project
Thanks
can temperature equivalent to 1000 degree c be produced by the help og eddy currents????
if so what should be the strength of the magnet used?
can iron be used for the same???
I have never looked at calculating how much heat is produced. I would have to think for a while as to the best way to calculate the heating. The heating would be directly proportion to the total change in flux with respect to time. So the larger the magnet and faster the motion the greater the heating.
thank u sir...could u plzz confm it...is it possible st all?
Yes it can be done. From the changing magnetic flux caused by the motion you can determine the electric field intensity induced in the aluminum. Then from the resistivity of the aluminum you could determine the resistive heating. Alternatively, since the solid aluminum pendulum stopped immediately upon entering the magnetic field region, the kinetic energy the pendulum had would have been converted into heat--a simpler way to get an estimate of the heating.
very thank u..sir...u helped me a lot...
I'm not sure what is practical using a mechanical motion to produce induction heating, but using an AC signal to generate the changing magnetic flux is how induction furnaces operate, en.wikipedia.org/wiki/Induction_heating
And that is what we call visualisation. Our teachers explains us this on blackboard and we don't understand a thing.
That is why I started to develop all these demos for my class.
Hi Michael!, I have a question... If there's a steady neodymium magnet and I horizontally slide an aluminum strip considerably close to it, the strip will slow down till it stops or it will just continue to slide but a bit slower?
Interesting question. As it slows down, the eddy currents will get smaller and smaller, but they should still be there and exert a force on the bar till it stops. But it won't actually be held in place by the magnet, so any additional outside forces and the bar will move. That is why when used as the brakes for a roller coaster magnetic brakes can't be used as block brakes so there has to be an additional brake to stop/lock the roller coaster.
en.wikipedia.org/wiki/Brake_run
physics.gu.se/LISEBERG/eng/magn_brakes.pdf
Great!. Thank you for the answer, it helps me a lot. Have a good day.
Please let me propose the following model to describe the pendulum position: for some positive constants {a, b}, the angle respect to the vertical x(t) should follow, in order of achieving a finite extinction time, something of the form:
x''+ a sgn(x') sqrt(|x'|) [sqrt(2)/4 +
|x'|^(3/2)] + b sin(x) = 0
hope you could try it matching the constants with experimental results, I am quite sure you aren't going to be dissapointed.
sir can we do it without gap magnet
because its to costly and is not available to me
Yes just get the strongest magnets you can find.
is it a neodymium magnet or just a regular magnet and where did you buy the aluminum like that )cuz of the shape of the aluminum(
This is the magnet, www.pasco.com/prodCatalog/EM/EM-8618_variable-gap-magnet/ and these are the paddles www.pasco.com/prodCatalog/EM/EM-8642_magnetic-force-accessory/index.cfm
U r good sir
u r best
اني طالب سادس اجبت اشوف النشاط
hey sir , i have lots of questions
1)can i use 10mm x 1mm neodymium magnet if not plz justify .
2) which type of sheet you have used steel or aluminium or stain less steel.
3)how you have attached the magnets at that object which you have used .
4)way you have attached the magnets in brief .
plz justify beause i want to do it practically
plz
1. yes, but the more magnetic flux the stronger the braking.
2. the pendulums were aluminum
3. Not sure of the question, the magnet I used was this one
www.pasco.com/prodCatalog/EM/EM-8618_variable-gap-magnet/
Why does braking occur?
I can;t understand why the current generated leads to the braking ( or the dampening of the oscillations, if i may say ) ?
I understood everything else in this video, just this fact. Please help.
+Kartikey Misra A current will generate a magnetic field. (See this video demonstration of a current turning a coiled wire into a magnet ruclips.net/video/s-qHfqYAvaw/видео.html) So the induced current in the aluminum paddle will generate a magnetic field essentially turning the aluminum paddle into a magnet. It is the interaction between the induced magnetic field in the aluminum paddle and the permanent magnet that does the braking.
thank you!
You are welcomes. I am glad the video helped.
Hello professor Melloch,
My name is Rich and I was wondering if you could give me an opinion on a possible solution to a problem I’m having with a set of carburetors that would involve eddy current damping.
The problem I’m having seems to be caused by the vacuum operated parts of the carbs lifting too early and fluttering.
When this occurs, the engine quickly loses power and stalls, probably from an over rich condition.
Here is a video of that happening; it should start at an appropriate time index.
There is a white dot on the #3 throttle slide ( 3rd from the left), it bounces rapidly as the throttle is opened.
ruclips.net/video/VtmbGLGt3qw/видео.html
What I’m wondering is if I could put a small magnet(s) in the plastic throttle slide ears as a way to damp out the fluttering. Not sure what the carbs are made of - Aluminum or Zinc or some alloy in between. This video starts at a point showing the slide suspended in the carb body.
ruclips.net/video/6sd-YwEv0Jo/видео.html
I think the fluttering is caused by the air intake pulse on this 4 stroke engine and a lack of slide damping.
I would appreciate your opinion as an expert in this field.
Thanks
woag! awesome!
Thanks!
Sir , I think you r wrong , what you r trying to say is that , electro magnetic damping happens due to change in magnetic field , well it's wrong . Let me explain , change in magnetic field produces induced electric filed.Change in magnetic flux or Eddy current causes electro magnetic damping . There is a difference .