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- čas přidán 28. 08. 2024
- A demonstration of electromagnetic induction using copper gaskets and a bar magnet. This is also referred to as Lenz's law to remember the direction of the induced magnetic field. I made an error right at the beginning of the video referring to copper as paramagnetic. Copper is a diamagnetic material.
I made an error right at the beginning of the video referring to copper as paramagnetic. Copper is a diamagnetic material.
It's ok, we are humans though...
👍👍
Very clever and a terrific way to make the needed point ! Thanks.
Fcr
thank you so much for such an informational video....i scoured the internet trying to understand lenzs law and formulate an experiment for it - this video provides EVERYTHING i need for my project. i am eternally indebted
I'm glad the video was useful!
Simple yet precise !! Lenz Law at work !! TQ Michael.. will be useful for my Online Class today on Electromagnetic Induction 👍🏻😁
Glad the video was of help!
i was thinking about this law and i got in recommandation, excellent explanation 🔥🔥🔥
Thank You! I'm glad it was helpful.
Wow! Amazing explanation sir... Thanks a lot 💯
You are most welcome!
BROO the video was great ! really helpful
Thank you!
@@electricandmagneticfields2314 no problem sir
Great video .I was read maybe 15 times Lenz Law but I was understand just.Now My magnetics knowlodge nearly to Heinrich Lenz 😀
Thanks!
Nice video nicely performed❤️
The gasket with the cut still forms current but they are called eddy currents that don’t all form the same direction
outasight..Thank you so much for uploading ..Just found your channel..
You are welcome!
I guess even though there is air gap in copper gasket in left, it will still create magnetic field as magnetic circuit will be completed because flux can pass through air...
Am i right? If yes then why isnt it moving?
There is very little current that flows in the copper gasket with the cut, just enough to charge up the two ends. So essentially no current is flowing so no magnetic field is being produced. With the other gasket with no gap there is much more current flowing and so a much large magnetic field produced.
Saved my 1 hour
Thanks man👍
I get the experiment and lenz law this video explains it in a very nice way but why does copper move if magnetism does not affect it?
Moving the magnet causes a changing magnetic field inside the coil. This changing magnetic field causes an induced current in the coil. A current causes a magnetic field. So the coil is turned into a magnet by the movement of the permanent magnet.
Here is another example of turning a coil into a magnet by flowing current through the wire to produce sound,
czcams.com/video/6Slmr99o5wI/video.html
@@electricandmagneticfields2314 thanks A LOT for the response. aaah, I think I'm getting it a bit more now... So it's the current in the copper that is making it a magnet not the characteristics of itself... Right?
@@scienceblossom6197 Yes the current in the copper generates the magnetic field, nothing to do with the copper.
Can some one say why north pole is formed in the coil when the magnet is bought , I mean why it is repelling instead of attracting the magnetic field line goes inside the loop , it should make it attract it right kindly explain
Simply... AMAZING!!
It really is!
Is the amplitude of the opposing magnetic flux that is induced equivalent to the magnetic field of the magnets that are inducing it?
Moving the magnet produces an electric field. That field is the same whether the copper gasket is there or not. (As long as you are moving the magnet the same.) With no gasket you are producing no induced magnetic field because no current is flowing. Imagine the ring is made of different materials ranging from a perfect insulator to a good conductor. You would get an increase in the induced magnetic field as the resistance of the ring decreases because you are generating the same electric field but larger and larger induced currents as the resistance of the ring decreases.
@@electricandmagneticfields2314 Thank your for your response. Supposing a perfect conductor, would the induced magnetic field strength be the same as the (magnet's) inducing one?
Love from Indian students
This is Hardik Mittal
Thanks!
so is there current in the copper gaskets or no?
There is a current in the gasket without the cut. In the gasket with the gap there is a very brief current that develops a voltage across the gap.
Well done sir very useful
can we take an alumnium sheet instead of copper
Any conductor.
If you cut a copper pipe like you have cut your copper seal, you can induce faradays current. People cut it so you can see falling magnet slow down. I wonder why a slot works on pipe but not on the ring
This is because a copper pipe, even with a slit, still forms current but they are eddy currents. Same with the cut gasket. Eddy currents are like little swirls of current like u would see in water when taking something out quickly. These eddy currents still produce a magnetic field. A pipe has much greater surface area than a gasket so u see this effect much better
With Which material does this magnet is made ?
It is a rare earth magnetic, NdFeB , so very strong.
Good demonstration
Can I use aluminum or iron gaskets???
yes, any conductor
Physics ❤
I think the reverse current that lens law demonstrate is actually because of proton not electron.I don't know upto what extent we can check physically..like Rutherfords gold-foil experiment.present technology the possibilities iam not aware.If someone interested do try.
In copper the conduction is due to electrons as is the case in any metal.
@@electricandmagneticfields2314 iam talking about the reverse current.Its not new thing we learnt when an electron leaves a hole is formed.hole is positive.
Iam saying even holes moves like electrons which constitute reverse current irrespective of metal
@@Aslamkhan-cx2ue There are no holes in metals. They only exist in semiconductors.
@@electricandmagneticfields2314 when movement of electron I mean transfer of it creates hole then why not in metals..law is universal right?
@@Aslamkhan-cx2ue No but it is difficult to explain. Holes are a quantum mechanical phenomena that occur in semiconductors. In a semiconductor you have a band gap whereas in metals you do not. So you start out with conduction electrons in a metal where you do not in a semiconductor. A bond has to be broken in a semiconductor, or an atom in the semiconductor replaced with a donor or acceptor, to get conduction charges. So in a semiconductor you can get either negative (electrons) or positive (holes) charge carriers.The protons in a metal are not mobile, they are always bond to the nucleus. The only thing you have in a metal that can flow are the conduction electrons.
For the love of physics ❤️
Superb thanks 💎
If cut a spot out of a transformer. The steel will still be magnetized. Maybe because it's an AC current
Sorry, I am not sure what you are asking.
Better example. If cut a line down a copper pipe and drop a magnet through it. The magnet will still fall slowly.
@@nickbaylander6320 yes like this czcams.com/video/H310MWSWxF0/video.html
Apologies.. TQ Prof !! 😊
Why doesnt it work with copper coil
becouse copper has a weak effect of magnet
It works
I think should try connecting the ends of the copper coil together
Thanks💙
Good
Great 🙏
Thnk u very much sir❤❤❤
You are most welcome!
Nice
♥️♥️👍🏼
Copper is diamagnetic. Sorry🙏
You are correct. All materials exhibit diamagnetism and the one unpaired electron in copper is not enough to make it paramagnetic, resulting in a relative permeability of 0.999994.
Wow , got a reply thanks 😀
Actually sir, I was watching your video to make a video on lenz law 😀. You explained well
@@XperimenterX Thanks!
Hi