Any class 12 indian students here🖐️🖐️

For those that keep saying that you wished he was your teacher when you were younger or whatnot: look at the bright side, that it is possible that he is now a teacher to everybody is a beautiful thing. It's a wonderful time to be alive.

I teach Electromagnetic Theory in University and every time before I teach Faraday's law I go through this lecture as a part of my preparation, it is so so good.

I'm over here getting an MIT education without the cost of tuition... love it.

This website contains all my 94 course lectures (8.01, 8.02 and 8.03) with improved resolution. They also include all my homework problem sets, my exams and the solutions. Also included are lecture notes and 143 short videos in which I discuss basic problems. ENJOY!

If everyone had a teacher like you, learning would be not only easy but enjoyable :) Thank you for all your lectures.

Prof Lewin. Your lectures are among the best science lectures ever delivered anywhere. The MIT students were incredibly lucky that they got it live,but thanks to the marvel of the internet, practically anyone anywhere in the world (provided they understand English) can learn from your incredible ability to teach. My deepest respect for you and a deep bow of gratitude.

"...Concepts is what matters ..." 3:15 that is the heart of physics ; understanding the concepts, and how they connect with each other.

I can see why MIT are keeping chalkboards as opposed to replacing with hi tech. Your chalk skills are amazing. Great lecture too! Thank you.

Mr. Lewin, you are a brilliant teacher. I really love your methods of teaching which make Physics extremely interesting to learn. It's a privilege for a young student like me to be watching your lectures. Thank you so much, sir, for uploading them on the web and making it accessible to all.

What a fantastic teacher! His students are very lucky.

All thats needed is teaching slowly and taking your time. Those teachers are the real teachers.

He's the real doc from Back to the Future.

This legend is growing old 😢 if he dies the world will miss a genius.

I'm from Brazil and I better understand you than my professors, it's crazy because I've been learning English for 2 years! I wish you a long and happy live. God bless you

At 66 I have found I love your videos as a beautiful distraction from life in general. Thank you I am no longer bored.

Lectures with applied demos and derivations are always better than an entire lecture of numerical problems. Great lecture!

I found your channel by accident, and love how you teach and do your lectures. I am 60 and never went to college. I thought college was going to be like high school. If I had known there were professors like you, I would gone to college instead of going in the navy. Thank you for putting your channel up for us to watch.

Wow, I teach electro tech to apprentice electricians, and I found this lecture to be fantastic.I thought for a moment that it was going to get too complicated, but no ,just the opposite. I understood all that was being taught, and while beyond the scope of what I need to teach, this additional knowledge has help me considerably. How lucky we are to have the brilliant teachings available, and I have not have had to pay university fees to get it ! Also I wont feel so bad now when I make errors in my own presented white board calculations !

Now I think I'll be addicted to the sir's lectures, truly great and amazing to learn!!!

i m studying medicine. I left learning physics 3 years ago. But here i m watching him lecturing for hours. truly genius

Our physics teacher shows us clips from your videos since demonstrations are not possible in our tiny classrooms. Needless to say, we're hooked to you

My old physics teacher was this passionate, I loved physics and because of him I do not stand confused looking at something that seems like magic, in my head I'm thinking of all the laws of thermodynamics and try to figure out where the magic comes from.

Entire physics world is dependent on your lectures. In other words not only the students sitting before you are learning. Your lecture videos are seen by rest of the world

Mr. Lewin, I am an automotive technician, and teach small groups of other technicians, I use Faraday, and Ohms law math daily in my instruction, during the course of me teaching ignition coil(step up transformer) analysis, and failure. I use a bench test setup with a simple circuit, a 13.8 vDC regulated supply, a ground side switch and a commercially produced, internally resisted, automotive grade ignition coil wired to a .050 inch air gap. I never understood why my switch would burn up only upon the opening of the circuit, realizing the effects of Faradays law and the internal structure of the step up transformer used, I added a capacitor(in the automotive world they are labeled as condensers) in parallel with my switch to absorb the left over current during the collapse of the magnetic field. This resolved my issue, and I figured it out thanks to this video, I watched it for the first time yesterday. and this was the first of your videos I have ever read, but it will NOT BE THE LAST! I want to thank you for allowing this information to be available to those of us that were not placed in a position to learn it before.

The last 10 minutes of the video perfectly explained how great of a teacher you are,sir.

Physics is very easy to understand with your lectures professor.

It's amazing that such high-level lectures are available for free. Thank you for posting.

Not all heroes wear capes. Thanks a lot! Regards from Argentina.

I understood almost everything you taught in this lecture as a 10th grader . Sir you are an amazing teacher. Love from India ❤️🇮🇳😃

I demonstrated at the end of my lecture #16 of my 8.02 E&M course at MIT that two identical voltmeters attached to the same 2 points in a circuit can show very different values. kzfaq.info://kzfaq.info/get/bejne/pK2BlaRjz93Ph30.html This can also be demonstrated with a transformer. kzfaq.info/get/bejne/mJ2ZZdh-3Z3LeKM.html The reason is that an induced EMF (Faraday's Law) creates a non-conservative E field. When a voltmeter reads a value V it means that the integral of E dot dL across the voltmeter is V. In cases where Kirchhoff's loop rule (KVL) applies, 2 voltmeters attached to the same 2 points in a circuit will always show the same value. Kirchhoff's original text can be found in the following link, pages 497-514: books.google.de/books?id=Ig8t8yIz20UC. Clearly he was fully aware of the prerequisite for his "loop rule". KVL is a special case of Faraday's Law. That's why Faraday's Law is one of Maxwell's equations and KVL is not. My demo was first suggested and published by Romer in December 1982 in the American Journal of Physics. This demo has now become a classic; it's done all over the world at many colleges and universities. *ElectroBOOM and Dirk Van Meirvenne believe that 2 voltmeters attached to the same 2 points in a circuit must always show the same value which is not true.* They each posted a video on their channel in which they claim to have proof for their wrong ideas. Also read Professor John Belcher's thoughts on Faraday's Law and on KVL. Professor Belcher is my former colleague at MIT. freepdfhosting.com/0813df09f5.pdf *ElectroBOOM insulted me in his video by mentioning that the reason why my 2 voltmeters read different values was due to "bad probing". He stated that if I had done the demo correctly I would have found that both voltmeters would have read the same value. He could not have been more wrong.* The following video may also help some of you to understand why 2 voltmeters attached to the same 2 points in a circuit can give very different readings. kzfaq.info/get/bejne/ipyDaLmElZncipc.html I thank Mick Vall for his insightful msgs.

indeed sir, you are among the greatest teachers of physics to ever exist. love from India🙏

36:02 ......made me remember that anythings possible! I absolutely love all of Walters lectures!

When you teach,I don't feel like you're teaching a subject but teaching reality and truths.

Hello once again Dr. Lewin; Your lectures are proving to be a fun and productive learning experience for me. Your passion for physics, your knack for communicating and educating, and the strength of your convictions in the wake of the controversy created surrounding the validity of Kirchoff's Loop Rule, have inspired me to challenge my own understanding of concepts that I've often failed to appreciate. I credit you for empowering and inspiring me to treat both sides of the controversy equally and fairly. It's amazing how so many have attempted to set the record straight and discredit your provocative claim by simply declaring that you are wrong; and then proceed to apply their own spin to the results of your experiment, defending Kirchoff's Loop Rule, and focusing only on your error; while adding nothing toward understanding of the concept of Faraday's law that you were presenting. All of the arguments I've reviewed and studied are convincing enough at describing what we were all taught; but none seem to convey an understanding of your point of view or your presentation, sufficient enough to challenge them. I wasn't looking to be told what I know... or think I know. I was intrigued by the possibility of learning something new. I began dissecting your lecture, hanging on every statement and visual aid presented until I became certain that I understood you every step of the way. At 38:36 in your lecture, you make the statement "So far so good!", and I am in complete agreement with you up to that point, including your corrected Ohms Law equation (at 35:59) up through and including your statement at 40:28 "... and now it's not so simple... because there's no battery." This is where you switch from a conservative model to a non-conservative model, at which point the difference between them becomes quite clear and intuitive. Aside from correcting your Ohm's law error, you never discovered nor took note of it through to the end of your lecture. I'm speculating that the error may have been steering your thinking in the moment and stayed with you; but maybe not. Continuing from 40:28, you follow with "and so now when I go from point D to point A... I don't have the "1" and therefore I now find -0.1 Volts... I find a totally different answer." This is where I became disconnected, and asked myself the question "How can the voltage drop across two resistors be opposite in sign when the current is flowing in only one direction? So I listened further for the answer... As you stated... this is not intuitive. At 44:20 you make the point: "keep in mind that with non-conservative fields, it depends on the path". That statement seems intuitive and clear to me, and I interpret this as the encircling path of the loop with the induced emf flowing in one direction only at all points around the loop; but changing direction in concert with the building and collapsing of the magnetic field that induces the emf in the loop; as observed in your multi-turn loop demonstration using a solenoid and center reading Galvanometer. In the schematic drawing shown in your lecture notes, you correctly show the loop current flowing clockwise inside the loop, with current flow from node D flowing down through R2 and down through voltmeter V2 to node A. On the opposite side of the loop, you correctly show the current flowing up from node A through R1, and up through voltmeter V1 to node D. Missing in your drawing is the polarity of the connected voltmeters. Your schematic is accurate and clearly indicates that the the polarity of the voltmeters, and the voltage drops across R2 and R1 are reversed; as they should be when diametrically opposite the loop from each other with current always flowing around the loop in the same direction. Therefore experimental measurements must observe this convention; with the positive side of voltmeter V2 connected to point D, and the positive side of V1 connected to point A. Assigning the the polarity of the voltmeters, consistent with the convention used in your schematic will show that V1 = + 0.1V, and V2 = +0.9V, with their sum now equal to the 1.0V induced emf in the loop. Your experiment demonstrates and satisfies all of the supporting findings of Oersted, Faraday, Kirchoff, Lenz, and Ohm without conflict. Additionally, it also demonstrates that the validity of Kirchoff's Loop Rule is independent of conservative and non-conservative fields. A slight rearrangment of how the loop is presented, may also make it a bit more intuitive to conceptualize. Unfortunately; I am unable to upload my rearranged schematic drawing to KZfaq. Best wishes and respectful regards; Gary O'Neil

I love the interjections…some professors would never highlight their mistakes

Awesome! It takes an extraordinary professor to make this material fun and interesting. Good job.

Lectures by Walter Lewin. They will make you ♥ Physics. kzfaq.info/love/iEHVhv0SBMpP75JbzJShqw 300+ videos. Many of them with high resolution. The ♥ channel has all my lectures and talks.

im 28 years old and didnt really care about learning for most of my life, nice to have such lectures available online, thanks

Its incredible that anyone can talk to a highly qualified person like and get a response at the comfort of their homes. Thank you

funny that some students are not satisfied with this kind of lectures... I find them inspiring and so clear! I wish I had such kind of teachers at university...

My respect to you, Sir. Knowledge is always heavenly!

Sir, what an amazing teacher you are, i'll never forget this lecture❤

I'm an ignorant human being. This guy is the teacher that if he was at the right place and time in my life, now I was an astronaut . Well done. The world needs more teachers like you. 🙋‍♂️Greetings from Tuscany .

Keep up the good work. You are interesting and quite informative. I have learned so much from your classes. I will be watching them all. Thank you.

Professor you never fail to amaze me.... Lots of love for saving my exams

I'm an Eddy current and Remote Field tech and this helped me understand the theory side of my job. Thank you.

What a fantastic teacher and man of MANY accomplishments, i re-watch these videos allot and i love them, such amazing content.

Dear sir ,your lectures plus demonstrations is too much awesome and make the student to much excited for physics .Keep it continue sir .love from INDIA

Why hasn't someone given this legend the noble prize

sir in my first time watching i had problems getting myself together, im very happy i stayed with it the last 3 years, i enjoy your lectures very much , im understanding now. your an excelent speaker

I'm more impressed and inspired by this teacher pedagogy than his demonstrations, this is the kind of teacher I want to be

at 71 and having Physics more than 40 years ago I am so very thankful that my instructors taught me just like Walter is doing, with "concepts" not just math! Those concepts have been able to be applied by me in the fields of electronics and electricity, carpentry, welding, even cooking food. Building houses and barns. I would say that the concepts are more important than the math, a calculator/slide rule can do math but it can't analyze a concept!

"that phenomenon runs our economy" Very profound!

I’m not quite sure how or why this showed up in my feed but I can’t stop watching this man teaching. I hated school. My mother had exited me out of school in the 2nd week of 8th grade so I actually have no idea what this man is saying but I still can’t stop watching him teach this. Apparently I need to be watching him so ok I’m subbing him and now apparently getting my learn on once again. Lol. But seriously I like this man and how he teaches. I would have really enjoyed having him as a teacher when I was in school. 😊

THIS is how you teach a class. Give real world examples beside your theory.

I always find myself in these videos, very good job. Thanks to you, we understand and love physics too

Dear Sir, I'm a student of Engineering Physics at Politecnico di Milano. Your lectures are absolutely amazing! You have the power to make people fall in love with Physics. I wish I had you as my Physics professor.

Sir, you are an excellent teacher and educating thousands of people everyday. I pray to God that I'll meet you in future. Thank You so much sir 👍

I have been watching these lectures to prepare myself for my Electromagnetics Waves and Applications class here at MIT. Your lectures are truly phenomenal and inspiring sir!

I love your way of teaching sir, thank you for sharing your knowledge

Walter Lewin; such a beautiful mind, great teacher, and he tells it as it is (as currently known). Love him!

i love how he teaches . thank you for posting these videos .

I'm not one of those who can easily talk about phisics, but I found myself watching these lectures and I discovered an amazing world.

Shapes! Colors! Pretty letters! Legit gonna die slightly less on my finals now, tysm

Awesome Teacher! My type of class. Thank you. I love it.

I really like your presentation. May God bless you with more wisdom and knowledge to continue opening our minds.

I’m a class 12 student from India, and I have all the topics covered here in my JEE syllabus. The lecture was truly very interesting and helpful. Thanks a lot sir ❤

I’m in physics 2 this semester. I wish I could have such a professor! Now I have to study on my own by watching helpful videos. I never watch TV, instead I watch KZfaq a lot. This video is so fun!

Actually all this stuff is experimental. Professor makes it interesting with his demonstration. God bless you sir. You are a great teacher .

these lectures are priceless, elegantly presented, informative and yet entertaining! i truly love this man.

dear prof. Walter LEwin sir, its very true indeed that we are being taught these things in class 11 and 12 these concepts are never explained correctly and we r told to mug them up without demonstration or anything u r a life saver i owe u one :) thanks a lot

amazing my man. I'm going to be an atmospheric scientist, I love your lectures, love how you teach, and it's very fun to learn.

Yours concept and way of teaching is so Clear and 90% Students can understand ❤️ legendary work💖 Lots of love sir from Nepal🇳🇵😊💖

Thank you for helping me understand classic motorcycle electrical systems. Understanding the pure fundamentals removes mental blocks that prevent us from learning.

Every time I watch this video I find it teaches unique perspectives everytime.

The whole Incident with ElectroBOOM was so amusing. I'm happy it happened just before I watched this lecture. Understanding the confusion helped me to digest the topic better. So thank you Dr Lewin and ElectroBoom. :)

😅 I have a lab due next month by watching this video you’ve clarified a lot of things. Thank you 🤗

I can assure you that if I would be going to college. The professor who I would take is Mr. Walter Lewin. YOU ARE THE MAN FOR SURE. Keep up the great work.

Thanks for sharing such a mind widening content. It is surely much more entertaining than TV

I wish I had a teacher like you in high school. Thank you Walter

Thank you sir for your great lecture and unmatched demonstration

I was struggling for this concept to learn for my NEET Then I came to you, and understood. Hope I'll pass the exam Thank you!

This type of lectures was what I always wanted..

Sir I'm from India and I wanna say that by seeing ur lectures I fall in love with physics 😊😊😊 Currently, I'm preparing for the IIT-JEE Exam, in which concepts are more important. Thank u so much professor 🙏🙏🙏🙏🙏

Great lecture!I love your demo at the end of this lecture! I have taken 18.02 before 8.02,I think it was a right choice.Because I have fully understood the word potential,non-/conservative field. I learned a lot from this lecture.Thank you prof.Lewin.😁

Thanks to those guys’ discoveries, I can watch them delivered by one of the best teachers on my phone today.

Thank you so much for this nice lecture! And I repeat, you are an amazing professor.

No words for your hardwork.... Great work👌👌👌

Studying from the best teacher in the world. What a feeling!!! 🥰🥰🥰♥️♥️

Thanks for these gems! I find myself working on some Chopin Nocturnes while following his instruction. (yes at the same time) It's like enjoying two audio books at the same time and able to comprehend all said details/material.

Your students are blessed to have you as their lecturer

This was amazing sir , the fact that Vd - Va can be different in a loop was beautifully demonstrated . Whenever I am watching your lecture, the end of one lecture makes me enthusiastic to watch other one automatically... It's wonderful.

0:33 "If you are very unhappy with your recitation instructor, you are complete IDIOTS, if you stay in that recitation!" I truly love this!

excellent course, thank you! I am engaged in induction fields for melting metals and levitating them , and all the experiments from this course work in them

Be proud to be among the best ever Teacher. may God bless you a lot

These videos gave me a better education and a genuine love of physics that the education system nearly beat out of me.

The best lectures on physics I've ever seen. (I studied physics in Germany and I am a retired teacher now.)

Another outstanding lecture. As an electrical engineer who has worked with transformers, this lecture has helped me to answer one question that was not clearly answered, where is the transformed voltage? It is electromagnetics explained in a concise, simple but powerful way. God bless you Professor !

Your method of teaching is very high....your lactures are so entertaining and increasing my curiosity to learn physics....thank u professor...