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Lec 1 | MIT 8.02 Electricity and Magnetism, Spring 2002



Uploaded by: MIT
Video Description:
What holds our world together?
Electric Charges (Historical)
Polarization
Electric Force
Coulomb's Law
View the complete course at: http://ocw.mit.edu/8-02S02
License: Creative Commons BY-NC-SA
More information at http://ocw.mit.edu/terms
More courses at http://ocw.mit.edu


Tags for this video: and charge Coulomb's electric electromagnetism electrostatics Introduction law matter mit of structure to

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hmmmm...where i ... ( 1 month ago by Auroraa94)
hmmmm...where i come from...this is junior high lecture...Americans call us savages by the way
can anyone explian ... ( 1 month ago by ahmedibrahimbhat)
can anyone explian here what is potential difference, volt, watts, power, charge, and apmere thanks alot
as a high schooler ... ( 1 month ago by thathomo)
as a high schooler stuck in an 8th grade class room (i went to private school before, i wasnt actually in high school but i took all advanced classes) this is what keeps me alive. i personally enjoy studying things like atoms, but in my 8th grade classroom they teach us stuff i learned in 5th grade. t be honest it's fucking rediculos and i vomit every time i have to sing a god damn song in class (yes, they make you sing songs in an 8th grade public school scince class, i miss private school.)
Potential ... ( 4 weeks ago by cakennedyp)
Potential difference (Voltage) is the inequality of electrical charges that exists at any given moment between 2 related points (you could call them "places") in a circuit. Take wind for instance: When you have two geographicall places with different atmosferical pressures a contradiction is established between those two places and wind naturally flows from the place with higher pressure to the one with the smaller one, so the contradiction will dissapear as it eventually does.
In electrical ... ( 4 weeks ago by cakennedyp)
In electrical conditions, if you have a difference of potential (the possibility to perform some kind of "work" using the energy naturally existing in each charge) between two points of a circuit, what you get is a flow of electrons traveling from the higher potential point to the lower one.
This flow is what is called electrical current (I) and it is measured in Amperes (the amount of charge (in the electrons) that flows in a given time (Coulombs per second)).
Nature is trying to ... ( 4 weeks ago by cakennedyp)
Nature is trying to dissapear the contradiction between those two points, but contrary to the wind example, if you create that contradiction artificially (like when you use a battery), the flow will not make the contradiction dissapear and, as long as you maintain the contradiction (the difference of potential between the two points), the flow of electrons will be continuous, and you get to control it since you decide how big the difference is.
Since you can ... ( 4 weeks ago by cakennedyp)
Since you can produce the flow of electrons in an orderly fashion by creating the contradiction, you have two events related by "cause and effect" Potential difference (Voltage (Joules per Coulomb) = V) and flow of charges (Current (Coulomb per second) = I): Power is the relation between those two related events and it shows you how big their relation is, since you multiply both V x I, and what you get is Joule per second (Watt)
, which means that ... ( 4 weeks ago by cakennedyp)
, which means that you have a unit to measure how much energy (Joules) you will use in a given time (seconds) to perform whatever work or task or effect it is that you are trying to accomplish with the flow of charges you produce (light a bulb, start an engine, operate a microwave oven, listen to music on your Ipod, etc). If you can understand that everything begins with the contradiction and that nature will always try to make it dissapear, the rest is rather easy.
spell physics right ( 3 weeks ago by scorpiaflame)
spell physics right
if you found this ... ( 3 weeks ago by athuang)
if you found this lecture easy. it is because its Lecture 1, and so is introductory.
the nucleus of an ... ( 2 weeks ago by srofficial06)
the nucleus of an atom is one ten thousandth the diameter of the overall atom ? i read someplace that the absolute theoretical speed of ferromagnetic action is one tenth light speed or 30000 kms ?
what , i wonder, ... ( 2 weeks ago by srofficial06)
what , i wonder, was the biggest piece of amber ever found and if it was found in the 18th century did the bored party girls apply silk to it and then to a horse or something larger than a frog ?
my last comment was ... ( 2 weeks ago by srofficial06)
my last comment was pretty dumb i wish i could delete it but i guess like physics things are not always so easy ? my apologies
The truth is we ... ( 2 weeks ago by sn1pe352)
The truth is we know how to make many useful things with electricity and magnetism but haven't a clue what they actually are.
I learned about electricity from Nikola Tesla and Walter Russel. Their books will blow your socks off
you are right ( 2 weeks ago by amrosik)
you are right
These videos are ... ( 2 weeks ago by krimlam)
These videos are great, when you are at home with a flu.
Thumbs up!
I am wondering ... ( 1 week ago by Lucky1Lucky1)
I am wondering whether most of the MIT faculty are of Prof. Walter Leuven calibre in lecturing; or is he just one of a few star lecturers. If it's former, MIT is truly the top technical university in terms of teaching also.
cat fur???????????? ... ( 1 week ago by apeFetus)
cat fur????????????????????
watch the other MIT ... ( 1 week ago by apeFetus)
watch the other MIT videos. Them profs arent as interesting :(
thank you for video ( 1 week ago by CHErUPb)
thank you for video
i think you mean ... ( 4 days ago by dunnobutwayne)
i think you mean Walter Lewin dutch prof at MIT
It's just a Physics ... ( 3 days ago by Hydroshock)
It's just a Physics professor thing I think. Every one i've had has been just as interesting.
this dude is much ... ( 18 hours ago by lianghaochen)
this dude is much better than my prof!
this course is very ... ( 17 hours ago by strayseaman)
this course is very difficult you need a prof like him



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