JEE #166 Electromagnet with Air Gap

I cover this in my 8.02 lectures

[hiteshsblog]

You may know or not professor Lewin... But this small and detailed daily base questions really helps.... Wish me luck for my 1st JEE MAINs April attempt Professor 😄😄😄🙏🏻

[beyondthelimitsoriginal]

Hello sir, you are sooo great I watch your video instead of doing my classwork😆❤❤

[dannymac]

I like to watch lectures in my spare time and out of all the lectures I have watched, yours are by far my favorite. I never got to go to college but if I did I would have certainly wanted you as a professor. Love the videos thank you.

[penuelaortizdavidandres]

Hi Professor! I just wanna tell you how much admirable are you, you are my role model. I appreciate you and your life work.

[duckyoutube]

Hello, hello, hello professor! Hope you are having a great day.

Just got done with a 2 hour study session. As always thank you for the motivation. You and Feynman are just amazing at making things sound so simple. Im learning a little bit everyday.

[duckyoutube]

Sir i just started watching Feynman's lectures and wow... The character of physical law alongside your 8.01 lectures offers such a huge insight in how to see and measure the world.

Its absolutely beautiful that gravitational force is the product of the gravitational constant, the mass of 2 bodies, divided by the square of the distance. Its cool to know the that everything has some kind of effect that can be measured no matter the distance. Everything has a relationship with each other.

And charged particles can be described in the same way.

And the law of conservation is another pattern of the fabric of reality.

You opened a big door for me. I see things so differently now. Im not sure what reality is but i know its very beautiful. Its like a dance.

[bullerheden]

The magnitude of the B-field in the air gap (and in the iron core) will be approximately 0.845 Wb/m² (T)
From your friend in Denmark 🙂

[coldblaze]

your love for physics is truly admirable professor.

[SaiGanesh]

Sir really thanks for you wonderful explanations it really helps me for jee and hope I'll get wishes from you sir 😇

[Patrizioquattromori]

always a top professor, I follow you with great admiration

[friendlyneighborhoodfbi]

Hello sir I am an jee aspirant and i love physics but I am weak in mathematics. sir do you have any tips for me I have my jee exam next year sir

[dghhrdhjhff]

47:00
Hello Professor Walter Lewin, How does the flashing ball work at the end of this lecture?

[-dimensions]

2.13 ×10^(-2) Tesla. Good question Sir. The space is between two poles.

[Jaifromchina]

Jee advanced questions are toughest exam but you solved easily

[torapali]

I have had 100 out of 💯 in physics, but have no interest in physics because I can't adding it in real. Can HC

[MuhammadSaeed-wqes]

Sir how I can find complete solution of university physics written by D.Young not available on internet. I read and felt this is a good book. Kindly guide me

[geezz]

Hello professor, i had hoped you would have returned to Quora, but i understand your reasons for leaving, I watched so many videos, it's like i got a near tuition free education, Thank you, I have a qustion, can a extremely high magnetic field, change the polarization of a laser ?? thank you,

[Hey_Ananyasingh]

Hello professor Walter lewin i am ananya Kumari I read in class 9 those who try never give up
God bless you you are best physician i am belong to bihar 💐💐

I am also read this question and to all study here thank to

Jee for electronic and fall here thank you so much 🥰🌈

[AcquirelQ]

I want to become scientist but I have no sufficient money and knowledge. But I have a lot of interest to reasurch what can I do
Sir plz help me
I too much take intrest in phyy

[bismage]

Hey professor.
I tried to figure it out and I didn't assume the magnetic field to be produced due to air gap. Thus assuming it as a solenoid my answer is:-471Tesla
And while assuming the air gap to produce magnetic field, it would be :- 1.307 Tesla
Thanks.