Electrostatics, Electricity-A Review

Description
This lecture is a review of the topics Gauss's law, Parallel plate capacitors, dielectrics, Ohm's law, Kirchoff's rules and kinetic energy of electron. A good way of revising all these topics. In the beginning of the class a top is set to spin on a plate and continues to do so till the end apparently without any supply of energy . Does it violate the laws of conservation of energy---is the question asked by the teacher?

Prof. Walter Lewin, 8.02 Electricity and Magnetism, Massachusetts Institute of Technology: MIT OpenCourseWare), http://ocw.mit.edu (Accessed June 19, 2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc