Electrostatics (part 2)

[hitmanvb47]

Sal you are the man! I think I can speak for almost everyone when I say I appreciate everything you do to help educate people! You teach more science and math to people across the country than all the overpaid professors at universities combined

[marinmb44]

khan . . does the electric field vector fall off to a certain limit? In other words, do the vectors converge?

[smpsn]

this is awesome thank you soooo much...im a 43 year old who is studying for stage one physics exam next week...job well done:):):):):)

[RonaldoOwnsMessi]

by the way, THANK YOU SO MUCH MAN.

[RonaldoOwnsMessi]

does anyone take this in grade 12? coz i am and i think it should not be in physics 30

[PPxrare]

Is there a video which explains Gauss's law ?? can someone please link the video for khanacademy if there is one, or just give me the link to a video which they thought explained gauss's law properly?

[mihiro271]

awesome explanation . very informative for beginners !!!  good job

[sdfjkgrace]

@ShankMasterKank LOL omg i thought i was the only one. i really like his voice!

[adisamun]

THE BEST!

[ShankMasterKank]

Dude, Sal, I don't know what it is about your voice but man it's really easy to pay attention to your voice. You have a pretty cool voice. :P

[Cukumuye]

@ShankMasterKank i would disagree...his voice is really annoying and sounds non-informative...but that's just me

[ShankMasterKank]

@Cukumuye To each his own I suppose. However Sal somehow manages to hold my attention.

[Dutchieboy20]

Smile at 11:02 :D

[MrChin000]

At 5:59 the electric field at that point is = (9 x 1000) / 4 = 2250 Newtons per coulomb not 2500. Kinda insignificant but just pointing it out lol. Awesome video man.

[zadock6]

Please, never stop your videos. Good didactics is so unbelievably rare and you are doing a great job in this field. thx for that

[TheDecayingmaterial]

I love his arbitrary changes of colours

[MrSukhpreetbal]

thanx alot

AY GOD GIVE U ENERGY MORE THN U CLARIFY ENERGY CONCEPT TO US

[Richmike8]

wonderful videos and very clear. Thanks!

[MindZiper]

Sal, it's 2250N, not 2500. Make sure to post a note in the video so this doesn't confuse someone (like it did to me :P). Thanks for the video!

[Agent6685]

I got the jist of what you were saying. My class is just starting to learn about this so no one except this other kid is as far as I am. I just want to thank you for the help. You helped me finished my homework., :D

[atyra92]

you've done a really great jobs ! thumb up

[Xclann]

Just making sure...

E = Electro Motive Force = Voltage = Electric Field?

Thanks

..

[angiesm89]

ur videos r really awesome! Going over the whole physics series to try and prepare for the graduate medical school entry test and it's so much nicer than sitting reading a text book, and your style of teaching is great! so thanks (all the way from Aus)!

[surostig]

This was an excellent video. Most certainly bolstered my understanding of the concept; also definitely taught in a very intuitive and meaningful manner.

[ATMfromNJ]

2 people aren't smart enough to see the value in these videos! GREAT WORK Teach!

[WolfgangKaipz]

go salman!

[aresdude]

My physics professor, Professor Wolf at Cooper Union told us that is a common misconception that more dense field lines means a stronger electric field. Good video though!

[SWWProductions]

u rock my world, ur getting me through uni, in fact stuff uni when i have khan academy

[11par]

squalar quantity at 4:15 lol.

[gearsofhalo2]

is there a formula that relates mass to charge?

[mansuliu]

9 * 10^3 / 4 is not 2500 LOL, no disrespect intended

[fwesh1]

@mansuliu how is no disrespect intended when you write a capital LOL

[GotKingKongBallzz]

You are one of the best teachers I have ever heard, and I don't even know what you look like!!

[LivinItBig9]

Woow! Thank You soo much!!!

I wish you were my physics teacher lol :)

[mahiou34]

thanks man !!!! really good explanation WaW !!!!

[peto45]

Thanks is not enough- I would be willing to pay to watch these vids!

[Justinlrb]

Shhh!

[tw0million]

what is stopping you?

[horntail140]

thnx so much now i understand electric field much better now :)

btw when u said that some field lines will end "infinitely" far away u meant that proportion of the magnitude of positive charge is related to the proportion of the number of lines beginning in the positive charge/number of lines ending in the negative charge rite?

[horntail140]

srry this is confusing...i mean

q1/q2=number of lines beginning in positive charge/number of lines ending in negative charge

because u mentioned that some lines will begin/end infinitely far away

[MistrEgg]

It's 2250 right? there isn't a correction listed anywhere, so it makes me think im doing something wrong.

[MaxorZoo]

Yeah, it's 2250.

2500 x 4 would be 10,000

[Johnjpcoc]

Oohh, my god thank you sooo much!!!

I got 26% in midterm for phy but after I was waching your vedio I got 72% for my seconed midterm test!!!!

Thank you sooooo much Sal !!!!

Thank you, thank you, thank youuuuuu.

[tnagan]

Sal you are awesome. Thank you so much for what you do for us!

[luketheduke1982]

blkjedi954, you do realise that Sal has quit his day job just so he can give FREE videos to the world. I found your comments disrespectful. Everyone appreciates the way Khan teaches because of the way he teaches.  He's giving up his time to educate whoever wants to be educated.

[BlueBlitz92]

@luketheduke1982

Disrespectful? Are you kidding? All blkjedi954 was doing was offering some constructive criticism. It's not like he was bashing Khan. He even said Khan was doing a great job (which he is, of course). Lighten up.

[blkjedi954]

@luketheduke1982 I hope you live in a different country where your opinions are restricted. So with a great big American "hell yeah", go play in traffic..lol

[blkjedi954]

awesome vids, but you probably should outline what you're gonna talk about beforehand. Sometimes it sounds like you're rambling, you go in one direction, then another, then you comeback. Its a tad irritating. I subscribe to you b/c you provide an alternative point of attack of the subject matter which is deeply appreciated and helpful. But try and remain focus when imparting material that is somewhat slippery to grasp. Thank you.

p.s. - Great job overall!

[sanmeg7]

d concept on how e fild decreases wid distances n y was explanativ n doubt clearing n thnx 2 d author 4 dat.

[lilmeng1]

ty. do u have anything on transistors ? btw its 2250 not 2500 cuz 9/4 =2.25 XD

[68951232]

which one is the first?

[upanddown2112]

these vids are awesome!

I most definitely agree that it's far more important to intuitively understand what the math describes, after all, that's what math's for!

btw, could you help me out with some of the more complex aspects of electronics? I'd like you to do a vid on transistors, op amp's, and maybe even a bit of boolean logic (I know I'm practically asking for another few sections) I'm just asking because I've had trouble making these things out and I think your genius could teach me why

[idricool]

Yes physics ! Thanks for the vid^^.