Explaining the behavior of the neodymium magnet close to a copper plate
Hello guys
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because it was directed by the thumbnail that exists in another video
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This shows that you are a person who is interested in the explanation
Behind the phenomenon
is interesting
And many people are just interested in knowing that this exists
But you do not want to worry about why this happens
This video then aims to try to explain
for you, why does this happen
and the explanation is in it from here
I have it here ...
a representation of our ...
... from our aluminum plate
Which is that larger square plate here is the neodymium magnet
This neodymium magnet generates magnetic field lines
Which leave the North Pole and arrive at the South Pole as on any other magnet
And these Field lines end up passing through the metal plate
When passing through this metal plate
The magnetic field lines passed inside the plate
This causes electric currents to be generated inside the plate
And these electric currents generate other lines of magnetic field ...
who will try to oppose the magnetic field lines of the neodymium magnet
Here we have a better representation
These lines that we call Secondary Field lines
Appear on the plate
The main magnetic field lines are those coming neodymium magnet
And my secondary fields are the ones that appear on the board
They arise because of these currents here
Which are known as eddy currents
These electric currents generate these magnetic fields represented here
Which will try to oppose the magnetic field created by the neodymium magnet
And according to the law of lenz
The field lines of the board should oppose the neodymium magnet lines
There are several videos on YouTube that best address this subject
Unfortunately we only have these sheets of paper
But you will find videos with animations of this representation
I will be including in the description of this video the link
An excellent video on this subject
So you can understand better ...
... The law of lenz the currents of Foucault and the Law of Faraday.
If you have interest without building a power generators
It's very important to know that.
Also for you who are high school student or college ...
... this video will teach you a lot.
Let me show you something else
These Field lines ...
Or rather, this force trying to hold the magnet
But this is not afflicted with the aluminum, right?
Do not because you see what happens with a simple piece of Steel
Sorry, I needed to make a cut in the video to look for this other piece of aluminum
But I want to show this to you
This plate is thinner than this
So watch what happens
I'll try to leave both with the same inclination ...
... see the speed with which the magnet descends
I now take the other plate and with the same inclination
And we see that it now descends a little faster
I will try to put them in sequence to observe this change of speed
When the neodymium magnet passes from the thick plate to the thinnest
This is because the eddy currents are more intense in the thicker plate
This is why ...
In transformers the cores are not made of a single metal block
The core is composed of a large number of thin plates
To try to prevent the emergence of eddy currents
What would happen if the core were composed of a single metal block
Divided into thin plates, these Foucault currents
And why are these chains a problem?
These currents cause some of the energy to be lost in the transformer core
The energy coming from the primary coil will supply power to the transformer core
And this energy must pass to the secondary coil
And a large part of that energy would be lost to the nucleus if it were solid.
So that's why we will find this large number of plate in transformers ...
to reduce the intensity of eddy currents
That's all folks, I hope you liked this video more.
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