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Lecture PDFs and Typed Notes

PDF Link	Lecture Topics
Lecture 1	Coulomb's Law, Electric Charges and Forces
Lecture 2	Electric Field Lines, Superposition, Inductive Charging, Induced Dipoles
Lecture 3	Electrostatics, Electric Flux, Gauss's Law
Lecture 4	Electrostatic Potential, Equipotential Surfaces
Lecture 5	E = - Grad(V), Conductors, Electrostatic Shielding
Lecture 6	High voltage breakdown, lightning, sparks, St. Elmo's fire
Lecture 7	Capacitance, Electric Field Energy
Lecture 8	Polarization, Dielectrics, Van de Graaff Generator, Capacitors [*]
Lecture 9	Electric Currents, Resistivity, Conductivity, Ohm's Law
Lecture 10	Batteries, Kirchoff's Rule, Circuits
Lecture 11	Magnetic Fields, Lorentz Force, Electric Motors
Lecture 12	Exam 1 Review
Lecture 13	Moving charges in B-fields, Cyclotrons
Lecture 14	Biot-Savart, Div(B)=0, High-Voltage Power Lines
Lecture 15	Ampere's Law, Solenoids
Lecture 16	Electromagnetic Induction, Faraday's Law, Lenz's Law
Lecture 17	Motional EMF, Dynamos, Eddy Currents, Magnetic Braking
Lecture 18	Displacement Current, Synchronous Motors
Lecture 19	Magnetic Levitation, Superconductivity, Aurora Borealis
Lecture 20	Inductance, RL Circuits, Magnetic Field Energy
Lecture 21	Magnetism... Diamagnetism, Paramagnetism, Ferromagnetism
Lecture 22	Magnetism... Magnetic field effect on materials, historicis
Lecture 23	Exam 2 Review
Lecture 24	RC Circuits and Transformers
Lecture 25	Driven LRC circuits, metal detectors
Lecture 26	Travelling waves, standing waves, musical instruments
Lecture 27	Destructive Resonance, Electromagnetic Waves, Speed of Light
Lecture 28	Poynting Vector, Oscillating Charges, Polarization, Radiation Pressure
Lecture 29	Snell's Law, Index of Refraction, Huygen's Principle
Lecture 30	Polarizers, Malus' Law, Light Scattering, Blue Skies
Lecture 31	Rainbows, Halos, Sun Dogs
Lecture 32	Exam 3 Review
Lecture 33	Double-Slit Interference, Interferometers
Lecture 34	Diffraction, Gratings, Angular Resolution
Lecture 35	Doppler Effect, Big Bang, Cosmology

Lectures

Lecture 3: Electrostatics

If net charge neutral in closed surface, total flux is zero.
Gauss's Law ALWAYS holds but is only useful in symmetric cases.
Charge UNIFORMLY distributed on sphere is same as point charge when outside sphere.
Gauss's Law holds because E-field drops off as 1/r2

Lecture 5: E=-GradV, Conductors, Electrostatic Shielding

Any hollow conductor will have zero electric field inside cavity. Consequence of Gauss's Law, just draw Gaussian surface, LoopInt(E.dl)=0
Charges move freely in conductors (by definition)
DEMO: Show no charge inside hollow conductor. Charges metal lid by first charging insulating glass plate by rubbing with cat fur (+charged) and touching the two. Then charges paint can (-charged) and repeats. Takes test sphere and touches OUTSIDE of paint can, measures significant charge with elestroscope. Now touches INSIDE of paint can and measures nothing with the electroscope.
Touch on polarization of hollow conducting box in static E-field due to external positive and negative point charges. Electrostatic shielding (Faraday cage).
What if we place a +charge inside a hollow conducting sphere? By Gauss's Law -charge gathers on inside (depending on where point charge is located. If closer to one wall then non-uniformly distributed on inside surface) of conductor to cancel +charge LoopInt(E.dA)=q/eps0. +Charge gathers uniformly on outside surface of sphere unaware of charges inside conductor.
DEMO: Place hollow conducting can in static electric field of Van de Graaff generator. -charge on 1 side of can +charge on the other, no charge inside.
DEMO: Lewin Goes in Faraday cage with radio and tinsel, turns on Van de Graaf generator to show effect of electrostatic shielding.

MIT 8.02x Electricity and Magnetism with Walter Lewin

Lecture PDFs and Typed Notes

Lectures

Lecture 3: Electrostatics

Lecture 5: E=-GradV, Conductors, Electrostatic Shielding