Lecture 2: Electric Field, Field Lines, Superposition, Inductive Charging, Dipoles, Induced Dipoles

author: Walter H. G. Lewin, Center for Future Civic Media
recorded by: Massachusetts Institute of Technology, MIT
published: Oct. 10, 2008,   recorded: February 2002,   views: 8749
released under terms of: Creative Commons Attribution Non-Commercial Share Alike (CC-BY-NC-SA)

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"Today I'm going to work with you on a new concept and that is the concept of what we call electric field. We spend the whole lecture on electric fields. If I have a -- a charge, I just choose Q, capital Q and plus at a particular location and at another location I have another charge little Q, I think of that as my test charge. And there is a separation between the two which is R. The unit vector from capital Q to li- little Q is this vector. And so now I know that the two charges if they were positive -- let's suppose that little Q is positive, they would repel each other. Little Q is negative they would attract each other.

And let this force be F and last time we introduced Coulomb's law that force equals little Q times capital Q times Coulomb's constant divided by R squared in the direction of R roof. The two have the same sign. It's in this direction. If they have opposite sign it's in the other direction. And now I introduce the idea of electric field for which we write the symbol capital E..."

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Comment1 Mr.Dione, January 23, 2010 at 1:52 a.m.:

If anyone want the subtitle of this lecture,i have in my personal page,do the download http://sites.google.com/site/professo...

Comment2 Mr.Dione, January 23, 2010 at 1:54 a.m.:

If anyone want the subtitle of this lecture,i have in my personal page,do the download http://sites.google.com/site/professo...

Comment3 Mr.Dione, January 23, 2010 at 2:04 a.m.:

The link o other is broken,use this link

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