Lec 20 | MIT 8.02 Electricity and Magnetism, Spring 2002

[Kricardose]

I am very happy to see the vidoe after you give this InductanceRL Circuits Magnetic Field Energy

[bebeheuy]

I Love The Video InductanceRL Circuits Magnetic Field Energy It Can Increase My Knowledge

[Mjhond]

Steady I Really Like This Video InductanceRL Circuits Magnetic Field Energy



[Einsmath]

just wonderful

[OuidaAliri508]

naa hab was geiles entdeckt haha

[amrosik]

@OuidaAliri508 zum ersten mal auf youtube?

[agapitoflores001]

Einstein relived! Hahaha.. I bet his a fan of Einstein.

[dardpak]

name of this physist?

[yourky]

Thank you Sir!!!

You are brilliant!!!

[IraqiAirborne7]

All greetings & appreciations to Water Lewin from a physics lover in Iraq-

[ScorchGD]

Why is this video restricted from view for TV connected devices?

(Wanted to play this for some friends on my WDTVLIVE but youtube says it's restricted.)

[yumyumblunts]

lost me at "Today...."

[jayhernandez1987]

this professor is amazing, always enjoy watching his lectures in physics.

[AMKalmar]

I'm surprised to see so few students filling the seats of the lecture hall.

[lunarkry312]

comparing this teacher to my e and m teacher makes me wonder if my teacher has any idea how to teach

[limacarlos1013]

Where is that differential equation? it's hiding? oh there it is hahaha guys awesome

[scpsjoker]

i was wondering when he turned off the power for the inductance experiment using the 2 light bulbs. BOTH went off instantaneously. should the one connected to the inductor fade away slowly?

[YT60017]

@scpsjoker no, the power is shut off, not shorted. If the battery were shorted as shown in 16:20 (so there's still a complete circuit), the inductor will take on the role of a 'dying battery'.

[digicho]

@scpsjoker Not right. Supposedly U assumed doc excluded source form electric circles which power bulbs as he did on board. But he just broke electric circles so bulbs cannot drain power from source or from coil. BTW switching off current form 30H coil gives v big voltage spike.

[Compact3]

So can you then make the coil always attract the metal plate instead of always repel each other? What should you change about you coil or AC-current?

[chinaskistar]

Someone knows the name of the piece of music he is playing at minue 39:00 ?? It is beautiful!

[zendeeQ241]

wouldnt outside magnetic force be approximated at 1 not 0?

dont we live in a constant magnetic/electric field?

at 3:00

[toogsh1]

we do live in a constant magnetic field, but we "isolate" the system, unless otherwise specified. the outside magnetic force is always negligible, and negligible means very close to, but not equal to zero.

[girishmovingforward]

awesome

[TSP105]

100% pure genius, you just have to love the way he discredits all those textbooks...

[freeqwerqwer]

This reminds me of my Electromagnetics 101 at Illinois Institute of Technology in Chicago. This MIT professor explains it with clarity, better than my former professor. It was hard for me then, but it's so simple now, like abc....but that was 20 yrs ago.

[goodluckpeace44]

what a long life have you had?

[zorryan]

My mistake, TRIPLE CHALKBOARD!

[zorryan]

Dual chalkboard!

[rasberrysauce]

what?

[rasberrysauce]

i dont get

it

[rasberrysauce]

im only in sixth grade sooo this doesnt make much sense to me!

[polska555]

i searched up something for grade 9 science.and i got this, dont ask why i searched Youtube; wikipedia and google didn't help.

pretty cool.

[azis1100]

Thank you MIT

[rawkiche]

what is that thing...N0..(he says something like: nu zero)

[KhuzdulXett]

μ0 - Vacuum permeability

[kfish117]

it's (m-yew) zero. It stands for the permeability of free space... it's equal to 4piE - 7

Source: I go to MIT

[PanaMV]

I thought that a solenoid in DC is nothing more than a wire, and that self-inductance only exists in AC circuits. The battery delivers DC curent

[vacagreens]

When you connect a DC battery to a solenoid, the current goes from zero to some non-zero amount, thus the associated magnetic field (flux) goes from zero to some non-zero amount and causes an induced voltage (self inductance). Same thing happens when you disconnect the DC. That is why current in an ignition coil of a car (older models) is turned on and off by a distributor and makes sparks in a spark plug.

[PanaMV]

thank you :)

[mdgreg]

@vacagreens dI/dt.

[tabarin]

this lecture is awesome! I wish more teachers could explain material this clearly

[gartherez]

wat grd is this for?

[a9ta9bo9y]

I think this is freshmen lvl...

[elcheno]

wow this is great! as a physics tutor i find this very useful thx!

[DestructZero]

I am a student of Electrical Engineering. Let me tell you that having access to these lectures is awesome! Thanks for posting!

[ReneeNme]

Boy I worded that like crap.

My guess is that could be one of the reasons why we are not students at MIT mchboy1.

(sigh)Much better.lol

[samaniego1989]

i love all of these videos, thanks for posting its...(from Panama)

[allgunsblazing1]

oh yeaaah.... inductance! but guilty gear is better.

[mchboy1]

i was lost after three minutes!! :(

[ReneeNme]

My guess would be that maybe one of the reasons we aren't students at MIT mchboy1.

: D

[benjamane]

sigh.

even if you understand, you still might not make it there.

like me.

[moisesmpf]

the Brasil need best teachers ......

here I make a question and the teacher don´t know reply...kkk so stupid study here

[hawksk8er12]

haha im only 14 but i get this stuff cuz he explains it so good

[gamesguru]

Great explanation of inductance. I understand it completely now.