Finally I got it....thank you so much sir... seriously we can understand physics practically more Thanks from INDIA

Sir, this is literally the best video explaining Eddy currents I have seen so far. Really appreciate that. Good work!

@sunnymourya8303

3 жыл бұрын

Absolutely ryt😁😘😘

@electricandmagneticfields2314

2 ай бұрын

@@sunnymourya8303 Thank you!

THIS SHOULD BE THE METHOD OF TEACHING NOT THAT THEORY, THANX SIR

@sherlockcule3779

Жыл бұрын

you need to learn both theory and practical

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.

wow sir it was a concept clearing video..............love from INDIA...............

Excellent! You completely cleared my concept of eddy currents.Thank you very much!

@electricandmagneticfields2314

7 жыл бұрын

You are welcome!

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.

I've been trying to understand this since the past 2 hrs and I finally did. Thank you.

Excellent demonstration that acts like a bridge between the book and the mind.

Teaching method is super awesome 👏. I understood the concept thoroughly. Love from INDIA 🇮🇳 ✌️

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.

Amazing video! I've understood the concept very well all thanks to you :)

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.

@electricandmagneticfields2314

Жыл бұрын

You are welcome!

Thanks! Really needed it.. :)

Wow this finally made sense, and I can see I am not the only one. Thanks :)

Really Nice demonstration! THANK YOU sir, !

Wow sir your explanation with specified experiment help me lot ,to understand the concept of eddy current. Thanks for your help.

nice video it' cleared my all doubts thank you sir,!!! 😊

Excellent sir Thank you for the nice video

You are truly wonderful. I never understood the topic in the Arabic language, so I turned to you and the explanation amazed me

@electricandmagneticfields2314

9 ай бұрын

Thanks for letting me know. I am glad the video helped you!

Really interesting Loved it

merci ca repond a des question depuis des année , oui la meilleur

@electricandmagneticfields2314

9 ай бұрын

je vous en prie

Very clear thus too nice....

well demonstrated... n well explained... wonder y this video has received only 50 likes... thnx a lot....

Exellent for explain.......Thank you..so much...you are No.1

tres belle demonstration ,bravo ca repond a mes question

Awesome video

It's really good. .🔥.I know this concept very well Sir..

Thank you very much sir. You are really doing great...

Thank you for this clear explanation!

@electricandmagneticfields2314

6 ай бұрын

You are welcome!

Could the effect be used as a drive coupler, would the torque be transferred effectively?

Awesome video.

Very well explained!

sir what can we use as a non conducting material for this project instead of your third one?

u r graet ...it clear all my doubts. .thanku

Best explanation!

wow! Excelent !

Underrated 👍

Thanks a lot sir! This helped me a lot :)

Well ,explained.

thank u very much sir , from Iraq

Thank you, sir, it was so confusing till I watched this video.

Thank you sir very nicely explained!

Thank you eng.Hussain 💪💪

Very Helpful...thank u

What is that rig called?

what is the stand you used to hold plates is there any other alternative

@electricandmagneticfields2314

6 жыл бұрын

I actually purchased these parts, www.pasco.com/prodCatalog/EM/EM-8642_magnetic-force-accessory/index.cfm

Thank you Eng.tabarak.sahib

@user-du1hx3co3b

4 жыл бұрын

واخيرا لگيك جماعه كتيب 😅💪💪💪 #المهندس 😌

@protabarak7857

4 жыл бұрын

@@user-du1hx3co3b @ebbhdhdhh تعال انضم للقناة هايه

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?

@electricandmagneticfields2314

7 жыл бұрын

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.

Super👌

Thank you, thank you, thank you.

@electricandmagneticfields2314

Жыл бұрын

You are welcome!

Thanks a lot...Sir😊

Best video thanks

@electricandmagneticfields2314

2 жыл бұрын

Thank you for your comment!

you are perfect. thank u so much for this

@electricandmagneticfields2314

Жыл бұрын

You are welcome!

Best best best Thanku so much 🥳🥳😜😜best explaination

@electricandmagneticfields2314

2 жыл бұрын

You are welcome!

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(

@electricandmagneticfields2314

7 жыл бұрын

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

Helps alot

Thank you very much best explanation

@electricandmagneticfields2314

2 жыл бұрын

You are welcome!

Can I get pdf of this experiment For my investigation project

u r best

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.

@electricandmagneticfields2314

Жыл бұрын

That is correct. I should have put an N on one and an S on the other to make it clear.

#احمد_كتيب 💪💪💪

Thank You so much

@electricandmagneticfields2314

10 ай бұрын

You are welcome!

Sala this topic mere dimag me aa nahi raha tha.... thanks bro... understood very easily 😁

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?

@electricandmagneticfields2314

7 жыл бұрын

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

@juliangnzz

7 жыл бұрын

Great!. Thank you for the answer, it helps me a lot. Have a good day.

U r good sir

Nice

So this can also generate a good amount of currrent

thank you!

@electricandmagneticfields2314

7 жыл бұрын

You are welcomes. I am glad the video helped.

where did you get the pendulum from , website or shop

@electricandmagneticfields2314

10 жыл бұрын

Here is a link to where you can purchase the pendulum www.pasco.com/prodCatalog/EM/EM-8642_magnetic-force-accessory/index.cfm

Thanks

sir can we do it without gap magnet because its to costly and is not available to me

@electricandmagneticfields2314

7 жыл бұрын

Yes just get the strongest magnets you can find.

That metal grinding sound.......unnerves me and my students 😂😂........ But otherwise thanks for an excellent demo

@electricandmagneticfields2314

2 жыл бұрын

You are welcome, sorry about the grinding sound.

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?

@electricandmagneticfields2314

Жыл бұрын

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.

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.

@electricandmagneticfields2314

2 жыл бұрын

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.

Thankuu sir

Wow !

How could someone get these tools?

@electricandmagneticfields2314

3 ай бұрын

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

Awesome application............

Can this demonstration equipment be purchased? My colleagues want one. Thanks 🙂

@electricandmagneticfields2314

Жыл бұрын

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.

THX . I,m from IQ (IRAQ)

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.

@electricandmagneticfields2314

9 жыл бұрын

+Kartikey Misra A current will generate a magnetic field. (See this video demonstration of a current turning a coiled wire into a magnet kzread.info/dash/bejne/pWGlqsiqiaTckdo.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.

Great explanation, though I'm wondering where in tarnation I can get those aluminium parts and the magnet ...

@electricandmagneticfields2314

3 ай бұрын

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

@bor3d_V

2 ай бұрын

​@@electricandmagneticfields2314 Thanks so much! Really helped a lot!

please reply fast...i really need it..

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

17 күн бұрын

I don't know anything about magnetic pumps. It is something I will look into and maybe there is a potential video there!

@peteabdu9179

17 күн бұрын

@@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: kzread.info/dash/bejne/l6ma18qQiJDAmrA.htmlsi=SGjZJTR_Idv97WEf&t=19 kzread.info/dash/bejne/e3Wf2rVqqLnYkdo.html

@electricandmagneticfields2314

15 күн бұрын

@@peteabdu9179 Thanks!

can you please tell me the strength of the magnet used ,thickness of metal sheet and the amount of heat it produced

@electricandmagneticfields2314

10 жыл бұрын

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.

@nidhikumari1351

10 жыл бұрын

thnxx...

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???

@electricandmagneticfields2314

10 жыл бұрын

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.

@nidhikumari1351

10 жыл бұрын

thank u sir...could u plzz confm it...is it possible st all?

@electricandmagneticfields2314

10 жыл бұрын

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.

@nidhikumari1351

10 жыл бұрын

very thank u..sir...u helped me a lot...

@electricandmagneticfields2314

10 жыл бұрын

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

❣️

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. kzread.info/dash/bejne/iKihxKmFd9eZodo.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. kzread.info/dash/bejne/aKeYj7uwddmWetI.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

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

@electricandmagneticfields2314

7 жыл бұрын

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/

Nice Presentation. Gives a thorough concept on eddy current braking. Can we use the same principle for generating torque? Please advise!

@electricandmagneticfields2314

6 жыл бұрын

The force is resulting in a torque on the pendulum.

@tmeindia

6 жыл бұрын

Thanks for your reply. Are there any formulae for calculating Torque? If so please share!

@electricandmagneticfields2314

6 жыл бұрын

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

I don't understand anything you are saying, but it's pretty interesting.

@klab3929

5 жыл бұрын

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

Is the kinetic energy from the paddle converted into thermal energy?

@electricandmagneticfields2314

7 жыл бұрын

yes, from the eddy currents flowing in the paddle, i squared R.

@ctank08

7 жыл бұрын

Thank you!

Great Video. Well explained Just wanted to inquire whether there is a formula to calculate the magnetic damping caused by eddy's current.

@electricandmagneticfields2314

Жыл бұрын

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.

@zaidsayed4388

Жыл бұрын

@@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.

@zaidsayed4388

Жыл бұрын

@@electricandmagneticfields2314 how do you determine current using faradays law

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?

@electricandmagneticfields2314

7 жыл бұрын

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.

@UshasiUpadhyay

7 жыл бұрын

Michael Melloch thanks a lot sir

@electricandmagneticfields2314

7 жыл бұрын

You are welcome!

@kidamaroo

7 жыл бұрын

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.

BESTTTTTTT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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.

اني طالب سادس اجبت اشوف النشاط

And that is what we call visualisation. Our teachers explains us this on blackboard and we don't understand a thing.

@electricandmagneticfields2314

2 жыл бұрын

That is why I started to develop all these demos for my class.

SD sir zindabad