Lec 2 | MIT 6.002 Circuits and Electronics, Spring 2007

[Kricardose]

I am very happy to see the vidoe after you give this Basic circuit analysis method (KVL and KCL mMethod)

[bebeheuy]

I Love The Video Basic circuit analysis method It Can Increase My Knowledge

[Mjhond]

Steady I Really Like This Video Basic circuit analysis method

[tushardesai]

How could more people have heard of Gaussian elimination than taken a class in Linear Algebra? Good question.

[SheraNadinepk29]

so wie geil hab 3 brüste

[agapitoflores001]

Pretty good comments. Great!

[lordmuratti]

the english subtitles are out of sync. how can i synchronize it. or is there a .srt or .sub file for this course?

[eddiea6987]

cant you do all this with a multimeter and get the voltage at each point?

[eddiea6987]

@eddiea6987 and current as well

[davestoj]

@eddiea6987 What do you mean by a voltage at each point? A voltage is taken as a difference in circuit potential between two points on a circuit; voltage is purely a relative quantity.

[eddiea6987]

@davestoj i mean if i have a power supply of 12v , then further down the circuit a voltage regulator outputting 5 volts and further down an even lower regulator giving me 3.3 volts , and if i did not know the part number of the regulators and needed to find out how much voltage is going through a certain point/part of a circuit couldnt i just stick a multimeter to the regulators common grnd and output pin and thus get how much voltage is going through that part of the circuit

[davestoj]

@eddiea6987 Indeed you could. Through the point of this analysis is to determine unknown voltages and currents without having to physically measure them. For something like voltage regulators, it's just easiest to physically measure their voltages.

[eddiea6987]

I clearly have no academic background in EE this is coming from my very new hobbyist perspective , try not to chastise me so much sir. but constructive criticism and corrections are very welcomed

[dojOdRiFTeR]

epic moustache

[legendmove]

Why there are only 3 KCL equations and 3 KVL equations? In lecture notes it says there are one redundant for each but I don't get how they are redundant.

Why these 2 are redundant?

I0+I2+I5=0

V4+V5-V0=0

[shadowC10ne]

@legendmove 22:40 Just like he said. Since there are 4 nodes making 4 equations we use only 3 because the forth can be derived from these three. If you check the nodes you'll see that these three equations cover all elements. Why would you need a forth one then?

[legendmove]

Fantastic lecture, thanks!!

[starbearer76]

anyone know where coarse notes and or texts books used in the class can be found? what text book did they use?

[TheBackyardBeaver]

@starbearer76

google mit 6.002

[2ndbestvideoever]

Node method begins at 33:05

[kaankara1987]

Instead of watching tv shows, i am watching the courses that i wont study in my undergrad curriculum for fun. They are exciting as any scenario, actually even better because they enable me to write my own life scenario. Don't think they are tiring much and they are broadening my understanding in a way.

As a physics undergrad, i will have some introduction to electronics but still i think understanding thought process of engineering branches and other sciences does only good to me. Free,easy,fun.

[shazaduh]

Please thumbs up if you would like to see Prof Agarwal to teach more opencourseware electronics classes.

[hrspwradctn]

this educational theory seems to follow the star trek (picard) theory where as people take high standards of education for the betterment of mankind not for money or selfish reasons, in a world where currency has been done away with.

[domanik]

Thanks MIT :-))))

[Indrid77]

What is the name of the text book being used for this course, anyone know by chance

[fwesh1]

@Indrid77 go to ocw.mit.edu, find the course under electrical engi and materials as well as the name of the text is there

[mocatz187]

It is true that American students are behind. Thats because they spend so much time indoctrinating our students with communism. Business and industry is now seen as evil here in the US. Our department of education has been getting rid of stuff like this.

In foreign countries engineers are admired here we call them geeks.

We are being destroyed from the inside out, then they will come for you "third worlders"

[theschoolofchuck]

@mocatz187 I think American students are behind because they are spoiled and immersed in pop culture. When I walk around campus, all I hear the American students talking about is their social lives and where the next party is. The foreign students are always talking about tests and subject matter.

[bioduds]

It is measured in mhos too. mhos and siemens are the same unit. Read the Nilsson book.

Thanks for these lectures!!!

[theschoolofchuck]

That was hilarious. Conductance is measured in m-h-o-s.

[qbslug]

Now I know why MIT  kicks ass. Their professors kick ass and the lectures are so organized and easy to understand

[puopg]

i hope i own this class this coming quarter because of this guy

[RussellTuan]

wow this make my circuit Analyze class i took before like child play!! 

[smoothawperator]

The instructor is great! Better than what my university offers... and THIS IS FREE! Amazing resource.

[shazaduh]

my favorite online professor after sal khan of khan academy.

[NuclearRadio]

Watching these videos piss me off because I see that MIT lectures are taught more carefully and more thoroughly than I ever had in college.

[kkkk888896]

too good to be ture

[szuhbi]

To The person posting those videos. Thank you. sharing knowledge is one of the most noble acts of humanity. thank you for your noble act.

[evOJoC]

yeah thanks a lot !!these videos are really good..

[canna890]

the direction of curnt at 17:30 in the voltage source is wrong

[33SaintBernards]

XD <3333

[StaticShock13]

This is so baller, thx MIT

[truelibyan]

I think he was confused about the units. In 11:49. He should have used ampers instead of volts for currents!

[truelibyan]

I think he was confused about the units in 11: 49 ; instead of using Ampers, he used Volts for currents

[mrvlhs]

that's a big piece of chalck right there

[myztic123]

do they still use chalkboards??

[jugodu]

I'm doing the same question.

[stucak88]

@myztic123 Chalkboards are the best. Much more better than whiteboards, because they are cheaper and they have bigger coefficient of friction.

[mrvlhs]

@stucak88 - no they aren't, because they make much more noise, are harder to clean and to write on. The last two are supported by your large coefficient of friction argument. Thanks for that one xD

[Goatseeee]

he stutters WAY too much...

[nokeeo]

This professor is so great!!! He explains this so well! I wish we had this in High school!

[kavoos1000]

he is great

[nicknamethieves]

who cares where he is from... sheesh. focus on the matter at hand boys and girls. and that would be circuits

[JettaJ1]

@nicknamethieves in my engineering classes there is only 2 girls in each class....:(

[nandinis7]

he's not a paki.. he's an indian.. there is a difference

[zaphraud]

Hell yes to this - There is a HUGE difference - paki's are Islamics, Indians typically embrace a variety of much more peaceful religions.

[bulliethepirate]

India has more muslim people than Pakistan but I advice you should focus on the video

[1987dman]

OR ELSE WATT?

[geethike]

Such a cool piece of chalk!

[erkicman]

Just want to make sure I get this right: what are the other 3 voltage loops in the KVL/KCL example circuit?

[tirumal909]

how could i come out to be negative when it flows from negative point since flow of elctrons is current and in practical it happens to flow from '-'ve to '+'ve direction. most of the books started following this. The current flowing from '+'ve to '-'ve is just convention used in earlier stages of development of physics.

[j0ovy]

i think the part where he explained d sigma or the summation E is correct.. because he insisted their that the summation of voltages throughout a loop is zero...the in and out that ur talking about is on the KCL part where the current entering is equal to current leaving........... :)

[pagalmadman1]

i thought only i was the only guy who cudnt answer the teachers in lectures....now i know....even MITians cant do that.....i feel better now.......lol !

[pagalmadman1]

he is an indian........... he's awesome........

[TheSlothify]

No his a paki

[pitecman]

THank you sooo much MIT i am an EE major Jr year a unc. Just found these vids. OUTSTANDING thx. GREAT teachers.... they really make the difference. THANK U

[rocky09873]

I could not imagine that MIT has such a low standard. This man does not know how to teach. I was just fooled around that MIT is the leading unv of US. But of course it is helpful for 3rd world country but the reality of MIT is exposing to the world now...

[AurumenK]

You do not explain things very clearly as you do not explain sigma or the other mathematical symbols [greek letter that looks like weird E] =voltage in must be equal to voltage out.

[m60yaface]

I understand what you are saying but i think maybe you dont know that you need to download the course notes from the M.I.T website. The link is in the window to your right as you watch the video.Check it out i think it will be a lot of help for you in explaining some of the symbols and ect..... you can take the M.I.T course over the net!

[ponit54]

How do you take a M.I.T. course over the net.

[DuckshotThePig]

Great series!

[NAGRAL]

Great great great .

i can't really tell how much you are helping us . especially the third world countries and sitting here we could never get such high standard knowledge , if it wasn't for you . These institutions like Stanford and MIT , of which we could only dream of , now are in our our rooms or we are there in their classrooms .hats off to the people behind this work , to reciever knowlege from these brilliant reserchers is really great . Thank you Mit . Mir Hassan Gilgit Pakistan

[reasonforlife214]

@NAGRAL very happy to donate my money to keep mit ocw available for you for free !

[sorodocul]

in romania you lear this in high school, not in some fancy unversity like MIT :D

[shoobyman]

No, in Romania this learns you.

[GodsEndtimearmy]

hey hes right..even in India here..we learn this in school and first year in collg...u shud watch IIT videos in nptelhrd channel..i think the teacher in this video mayb from an IIT or nyother colg..nope IIT wont come up to MIT in facilities

[dupreee27]

stop bragging abt that 3rd world country n its rotten education system

[pauliuzaszz]

3rd world country just beat your ass. Shut the fuck up, idiot.

[tigernov6]

ha ha singhala pukaz.

[BloodChuckNorris]

everywhere, but this is an introductory course, and you review some things. US students learn this in high school as well.

[eetFuk90]

you have written the same sentence in every single mit course video...if a high school degree in romania = a bachelors degree in electronic engineering, why isn't romania a country that is known to produce hichtech products:D:D besides, i don't believe that everyone with a high school diploma in romania can f.e.x. design circuits based on mastering maxwells equations and stuff

[rovercrew]

so why you watching these 'basic' videos in the first place then?

[zakdaviesa]

bollocks do you cos u become imigrints in ova countries and become farmers and what not

[gangstasal85]

u'll do this again in college, not every romanian gypsy does physics in highschool

[tugaric]

In less than 2 hours I learned MORE than in 3 YEARS! amazing! thank you ! :)

MIT gots really amazing teachers no doubt....

[Snoguube]

Mho?? Siemens.....

[yomomtubes2]

I agree

[JoshLucas5]

Question on the KCL. Shouldn't i0 be negative since it is going into node a? the other currents are leaving node a and they are positive.

[staticbb]

To be honest, i'm not sure it matters. I know for certain I learned that it's positive into the node and negative leaving. But as long as it ends as 0...it really don't matter.

[bluesrunthegame]

I understand that by the associated variables discipline the current is oriented toward the positive terminal of a component, but which is defined in terms of the other? That is, I can determine the flow of current if I know the position of the positive terminal and vice versa, but do not understand how to establish one in order to find the other.

[sunil2011]

Thank god for MIT.

[irfancute]

I have never experienced that kind of teching method in my life. It wonderful

[astranine]

Great teaching method and kudos to the camera person!

[krishds87]

thanks mit icould expirence that ha ha moment

[mrcoughman]

If my teachers were this good, i would have had such a better university experience.

[aboelken]

I went to UC Irvine, and classes taught on this level would have changed my life. Thanks for MIT, also Stanford for their classes

[QUICKONE21]

OCW is why the internet is so great! Thanks MIT.

[Digitalbumpin]

Excellent. Very entertaining to watch.

Nothing that isn't covered in a basic vo-tech course in circuits though.

[rcorle01]

keep watching and read further into this what Circuits and Electronics is about it gets WAY deeper than this.

[sanjosestate1]

MIT, you rock.

GOD bless your institution.

[shaggydaplaya]

wow how did you manage to load that long of a video, usually these vids are 10 mins tops!

[jarrod1937]

This is part of MIT's OCW initiative. MIT probably has worked out an agreement with google/youtube.

[julliards]

ty for posting.

[onaidirev]

this is great..... very helpful for us students

[wopskank]

i'm building a wind turbine all my electronics and electric knowledge came from you, Walter L and a few books i've learnt a LOT thank you v much.

[23rdprime]

@wopskank Ur comment is 4 years old.... Have u made a wind turbine yet ?? :P