Paramagnetism & Diamagnetism | Magnetism & matter | Physics | Khan Academy
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- Опубліковано 17 лип 2024
- Most materials are either weakly attracted (paramagnets) or weakly repelled (diamagnets) by magnets. Diamagnetism is an inherent property of all materials, and it arises from Lenz's laws. Paramagnetism is seen in materials whose atoms have at least one unpaired electron.
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Created by Mahesh Shenoy
I have made an error here towards the end. Aluminium is not diamagnetic, I shouldn't have included it along with Cu and Au. Actually, I wanted to say Copper, Gold, and Silver, not aluminium. Sorry!
Are sir.. Koi baat nhi.... You taught very well
Yeahhh…that’s not an issue….we enjoy dipping and exploring physical world with ur lectures..they’re amazing
No pblm we understamd ur feeling
No problem sir
You are best teacher
Wonderful! Now please explain atomic level para and dia magnetism to MIT professor Walter Lewin - a great teacher. A great man but, like each of us, he could use a better atomic model explanation of the cause of dia and para magnetic. The beauty of your version is that you don't go into the "spin" and the mandated opposite spin direction of the paired electron, which would fill another vid. You've done a beautiful job here. Very, very helpful illustrations. I thank you very much sir! More from you please.
for that we have to understand bohr model radius of nth orbit and other stuff of modern physics atom
For the first time, it feels like actually learning physics. Thanks sir 👍🏻
very true
I'm watching FloatHeadPhysics. One of my favourite youtube channels. And when I was watching this video I recognized his voice. I didn't know he is making Khan Academy courses. Mahesh Shenoy is an amazing physics teacher!
People go from this to that but you do the opposite
This video is absolutely great!!!!! Thank you very much.
The part that amazed me is around : 2:28 , i have been looking for this answer for a while now.
Same
Nothing have to say.....mindblowing
anyway, the video is better explained compared to others on the same topic. khan academy is great !!!
This is mind blowing. Easy explanation Thanks!
Its wow...outstanding ...no words ...speechless....its amazing
Very nice explanation including images..... Images enhance understanding the topic .....
I had so much doubts about this topic....
But all doubts cleared after seeing it
Thanks a lot sir, its the only video that helped me a lot through out youtube
Brilliant this is 😭😭🌠
I was struggling with it but u explained it like it was nothing
What an explanation!!!!!!!......Thank you so much sir
where did u learn these cool concepts from....... u made a really big fan today of yours.....
i have read that magnetic field produced by moving electron is negligible , and the spin of the electron is which determines whether para or dia ( attraction or repulsion respectively)
Sir please continue for remaining chapters also
Love u mahesh sir from tamilnadu (south india)
Your videos are great gift for us in these tough times
Yeah, I’m too from Tamil Nadu and there are so many videos on UA-cam but all of them are in Hindi. This man not just speaks English but explains everything so well. He’s a gift from God.
God damn it same over here
Lol same here😂
Sir my name is satish From bangalore please help me I don't know about magnet, sir I want iron reples magnet both sides please give me suggestions sir please
finally I almost clear about this magnetism thanks !
Very lucid explanation... ! Thank you!
Indians make brilliant teachers.
Clever, strict and kind.
Best explanation of this topic I have seen so far. Thank you so much.
Lot of love from Bangladesh, Mahesh Sir.
MASTERPIECE! A complex & potentially confusing subject that is not covered elsewhere (and believe me, I've watched LOTS of videos on this phenomenon) with anything like the degree of comprehensiveness & coherence exhibited here. THANKS!
This is amazing! I for one also thought at first that the molecules with no unpaired electrons should be completely unbothered by magnetic field. This cleared everything.
Absolutely Amazing
Nothing to say sir,You are just out of the box...
omg that cleared everything up. thanks so much!!
Bravo!👌
Thank you🥰🥰🥰💫💫💯💯💞💞
thank you so much for the simple answer
Sir, is paramagnetism is also a universal phenomenon like diamagnestism? if not how did you take D>P in diamagnetic materials
This is underrated!❤
Thank you for these 😭🙇♀️🙇♀️🙇♀️🙇♀️🙇♀️🙇♀️🙇♀️😭😭🙇♀️🙇♀️
Thanks for making things easier and simple!!
It is amazing how you give so much knowledge to us in a matter of 10 minutes 👍👏
Great explanation 👍
thanks dude, great explanation
Amazing mind blowing fantastic
Awsm 😍
Fantastic!
Great lecture.
Another great video!
Question) Why diamagnetism is remained to repel? If they induced to repel, shouldn't they rotate to counter side?
I suppose it depends in randomness . I mean there are paired electrons and all so , it’s in better order (in first case).
While in second case it oriented freely.
It’s my side of theory .
Please correct me if I’m not right!
Very correct explanation
Great content , 👌👌👌👌
Should not the arrow of the green loop point in the opposite direction since the electrons carry negative charge, i.e. using the left hand rule and create the opposing field?
That video I was looking for.
sir, please make the remaining videos of all the chapters😀
Should now dive into what is "magnetic"
2:28 is just awesome man. 😎
Thank you so much...😇
Mahesh Sir makes the class more interesting!
Superb🎉😊
Why is it, that in diamagnetic materials the effect of the lenz rule is not „turned around“ after the repelling motion. The magnetic flux ist reduced because of the repelling motion and following lenz that would evoke a motion towards the magnet to counter the change of magnetic flux, right? What am I missing?
Actually you are right in some sense. But you should know that the whole explanation of diamagnetism requires quantum mechanics so the explanation in the video is not the whole story.
Is there an atome which can be ( para or dia ) magnitism just by tempering with temperature ???
Thanks
Thnx🥰
Mahesh sir please make a video on mobility
Notice the field itself comes from an imbalance/disturbance of the electromagnetic field if it’s not in complete harmony it is producing phantom energy based off the difference in frequency this is the same way that prana or Chi works for destruction
can aluminium behave as paramag. and diamag. ?
Ksm se bhut easily smjha diya
if flux is not changing then the diamagnets doesn`t repel the external magnetic field? since there is no induces dipole in the diamagnets without changing the external magnetic field.
@khanAcademyIndiaEnglish Do you mean that is no random orientation in water molecules ??, does that mean a whirling water source wont be repulsed ???
aluminum is given as example in both para and dia in this video- please clear my doubt
It's super cool 😮😮
Dear Khan, correct me if I am wrong. Concerning the (electron) current loop (at 1.25), is it the correct magnetic moment direction? should it be otherwise because it is electron current?
Okay but how come gold, silver and copper experience don't paramagnetism. Idk if you have another video on this but my best bet would have probably been with the correlation of those elements being great conductor's easily sharing elektron's/low resistance. The currents induced by the magnets would cause the elektrons to flow through the material and thus constantly shifting the orientation main problem with this explanation would be thay there is in fact resistance and a constant electric filed so the electrons wouldn't be able to move indefinitely.
I hope to get an answer to this question especially since i am about to start college and study physics.
11 : 14
That's because of the universal rule by lenz -N*change in flux over time may that was of faraday I don't properly I can for sure say that that's the reason
Magnetism in a diamagnetic material is caused by the change in flux i.e the magnetic field right?
But that would mean that if a magnet is slowly kept near water water then nothing should happen. I am sure I have seen sources showing otherwise. Also that would mean that ( 5:07 ) if you keep a magnet stationary and then quickly pull it away, it would cause water to be attracted towards the magnet. That contradicts the fact that it will be neutralised, since there is nothing to neutralise in the first place. I would request you to resolve my doubt.
Sir my name satish from bangalore,sir I don't know about magnet,sir I want which magnet iron reples both side please give some suggestions please sir
Sir, they are not a loop right? They're just electrons spinning clockwise/anticlockwise then how can the emf be induced? Please do clear this doubt
But lenz law states that the direction of current induced depends on the movement of the magnet. If the magnet with n pole moves towards the current loop, n pole is induced to repel and oppose the movement of magnet.
Vice versa, If the magnet with n pole moves away the current loop, s pole is induced to attract and oppose the movement of magnet.
Wow
calcium does not have an unpaired electron, so is it still a paramagnet?
But is diamagnetism caused by Faraday's law? University Phyiscs and Oxford EEE Dictionary affirm so, but Walter Lewin disagrees: magnetic flux is not altering. Isn't the later true?
so is dr lewin wrong because he said that diamagnatism has nothing to do with lenz's law and it happens even when the flux constent ??
he said this in the lecture that you have mentioned
No words
6:25
Why are the south poles of O2 arranged towards the North of the bar magnet?
I feel it's breaking Newton’s third law.
Brother how can aluminium be diamagnetic as well as para
Damn! That's a mistake. Good catch!
❤️
10:30
I still don't understand at the beginning 03:17, why the green circle on the left becomes larger and the pink circle on the right becomes smaller, why the induced emf on the green circle is going upward and why the induced emf on the pink circle is going downward?????? I know Faraday's law and Lenz's law, but I am a bit confused here.
So, when the magnetic field is applied, those electrons having orbital magnetic moment (miu arrowhead) in the same direction as that of the magnetic field, slows down and the loop becomes small and the electrons having orbital magnetic moment opposite to the magnetic field will gain more speed and hence the loop gains size...i haven't researched how the electrons gain speed and lose speed, but i hope u get the idea
Whenever i search for logic and concept i come here
3:50
6:55
8:00
Is that frog alive 🤔
I have seen that video. I have a doubt that can frog sustain that much magnetic field? Or it dies? M
The permiabilty of the permanent magnet is close to that of air or vacuum. The explanation in the video seems to be wrong. How do you think of it?
Small correction: all materials are in fact diamagnetic, this effect is usually just overshadowed in case other interactions (paramagnetism, ferromagnetism, etc.) are present.
Hi, that is said at 10:55
Polarity +,+ or +,- or -,-
😲 i enjoyed learning this?? me?? lol
Wrong explaination. Lenz law says that the induced emf will always oppose current. So the current in both directions should get lowered by some amount.
Pravooooooooo eng artis
How is it possible that oxygen has diamagnetism if oxygen only has one electron ?
It's orbital in its highest shell. Derr. Paring electrons... look it up
Wrong explanation in each loop ,induced current will opposite to main current{ motion of electron)