Lecture 6: High-Voltage Breakdown, Lightning, Sparks - St. Elmo's Fire
recorded by: Massachusetts Institute of Technology, MIT
published: Oct. 10, 2008, recorded: February 2002, views: 25093
released under terms of: Creative Commons Attribution Non-Commercial Share Alike (CC-BY-NC-SA)
Download mit802s02_lewin_lec06_01.m4v (Video - generic video source 109.3 MB)
Download mit802s02_lewin_lec06_01.rm (Video - generic video source 83.8 MB)
Download mit802s02_lewin_lec06_01.flv (Video 225.4 MB)
Download mit802s02_lewin_lec06_01_320x240_h264.mp4 (Video 154.3 MB)
Download mit802s02_lewin_lec06_01.wmv (Video 426.9 MB)
Report a problem or upload filesIf you have found a problem with this lecture or would like to send us extra material, articles, exercises, etc., please use our ticket system to describe your request and upload the data.
Enter your e-mail into the 'Cc' field, and we will keep you updated with your request's status.
"Last time I mentioned to you that charge resides at the surface of solid conductors but that it's not uniformly distributed. Perhaps you remember that, unless it happens to be a sphere.
And I want to pursue that today. If I had a solid conductor which say had this shape and I'm going to convince you today that right here the surface charge density will be higher than there. Because the curvature is stronger than it is here. And the way I want to approach that is as follows. Suppose I have here a solid conductor A which has radius R of A and very very far away, maybe tens of meters away, I have a solid conductor B with radius R of B and they are connected through a conducting wire.
That's essential. If they are connected through a conducting wire, then it's equipotential. They all have the same potential. I'm going to charge them up until I get a charge distribution QA here and I get QB there. The potential of A is about the same that it would be if B were not there..."
Link this pageWould you like to put a link to this lecture on your homepage?
Go ahead! Copy the HTML snippet !