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!
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.
The audacity to call you a brother more than a teacher because your way of teaching is just good, just like that one bro in the school teaches whole class the topics before 1 minutes before exam, unlike those sleepy teachers or AI Voice... Love you sir❤
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!
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.
Yeah, I’m too from Tamil Nadu and there are so many videos on RU-vid but all of them are in Hindi. This man not just speaks English but explains everything so well. He’s a gift from God.
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
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.
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)
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.
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!
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.
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.
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?
Small correction: all materials are in fact diamagnetic, this effect is usually just overshadowed in case other interactions (paramagnetism, ferromagnetism, etc.) are present.
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
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
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.
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.
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?
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
sir you made another mistake @12:43 you wrote it correctly but you said: Paramagnetism is stronger than Diamagnetism, it should be the other way round as you wrote it.
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?
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
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.
