Lecture Notes
09/23: Course Logistics, Sections 19.1 - 19.4 (.pdf): Electric charges; insulators and conductors; intro. to Coulomb's Law and electrostatic forces
09/28: 19.4 - 19.6 (.pdf): Continuation of Coulomb's Law and Electrostatic forces, electric fields, forces and fields for single and multiple point charges, electric field lines
09/30: 19.7 - 19.10 (.pdf): Accelerating charged particles in uniform E-fields; CRTs; Electric Flux; Gauss' Law; Gauss' Law to derive E for a point charge and for an infinite plane of charge
10/5: 19.10, cont'd (.pdf): Gauss' Law to derive E for a thin spherical shell, a line of charge, and a solid sphere of charge
10/7: 19.11-20.2 (.pdf): Properties of conductors at equilibrium; van de Graaf generators; Charges/E-fields in the atmosphere; Introduction to electric potential V (of an electric field) and electric potential energy U (of a field-charge system); introduction to equipotential surfaces
10/12: 20.2-20.3 (.pdf): Examples of DeltaU and DeltaV in a uniform E-field; U and V associated with discrete single and multiple point charges; work needed to assemble charge distributions; lower (more negative) potential energy = more stable configurations
10/14: 20.3-20.7 (.pdf): Obtaining E from V; V due to continuous charge distributions; V and DeltaV for charged conductors; Batteries; Introduction to Capacitors
10/19: 20.7-20.8 (.pdf): Changing capacitance while connected to or disconnected from battery; cylindrical capacitors; voltmeters; circuit diagrams
10/21: 20.8-20.10 (.pdf): Combinations of capacitors and equivalent capacitance (series and parallel combinations); energy stored in a capacitor; defibrillators; energy density; Dielectric material in capacitors: dielectric constant and dielectric strength/breakdown, permittivity of a dielectric, molecular basis. Capacitance of Biological Membranes (to be discussed at Tues. lecture)
10/26: 21.1-21.2 (.pdf): Currents, Amp-Hours, Drift Velocity, Current density, Ammeters. Resistors, Change in potential energy when traversing resistors. V-R circuits. Ohm's Law. Resistivity, conductivity. Temperature dependence of resistance and resistivity.
10/28: 21.2-21.6 (.pdf): Light bulbs. Superconductors. Electrical power. Power transmission. Household circuits and electrical safety. Sources of EMF.
11/2: 21.7 (.pdf): Combinations of resistors in series and in parallel
11/4: 21.8-21.9 (.pdf): Kirchhoff's Junction and Loop Rules for Complex DC Circuits; RC Circuits (charging up the capacitor)
11/9: 21.9-22.2 (.pdf): Continuation of RC circuits: Discharging the capacitor (Note: see slide 3 for correction re: DeltaV for capac.!), energy stored in the capacitor as a function of time. Conduction in air (lightning; sparks). Introduction to magnetism: Bar magnets, magnetic poles, magnetic field lines, soft/hard/ferromagnetic materials. The Earth's magnetic field.
11/11: Univ. Holiday: Veteran's Day.
11/16: 22.2-22.4 (.pdf): Magnetic Force (direction and magnitude) on a moving charged particle. Motion of a charged particle in a uniform B-field. Cyclotron frequency. Solar prominences, auroras. The velocity selector. (Aurora-related youtube vids: see Lect. 16)
11/18: 22.4-22.6 (.pdf): Aurora-related vids. Charge/mass ratio measurement. Mass spectrometer; including example problem. Cyclotrons. Magnetic force and force per unit length on a segment of current-carrying conductor. Example problems for total force on a segment of current-carrying wire. Force/Torque on a square loop of current in a uniform B-field (NOTE: sorry for mixing up "a"s and "b"s in lecture; it's corrected here; please verify your own notes from lect.). I'll finish 22.6 with magnetic moments and electric motors on Tuesday.
11/23: 22.6-22.11 (.pdf): Continuation of torque on a current loop in a B-field. Magnetic Dipole Moment (incl. normal vectors, and torque in terms of magn. dip. mom.). Electric motors and commutators. Magnetic field generated by a long, straight wire (direction and magnitude). Ampere's Law to derive B for various current configurations. B-field at the center of a current-loop. Solenoids and toroids. Magnetism in matter: electron spin. (We'll finish with magnetic domains on 11/30)
11/25: Univ. Holiday: Thanksgiving
11/30: 22.11-23.1 (.pdf): Magnetism in Matter: magnetic domains. Air-core vs Fe-core solenoid electromagnets. Imprinted magnetic fields used in magnetic recording, and in the crust of the Earth, Mars, the Moon. Application: debunking Magnetic "therapy" bracelets. Faraday's Experiments and electromagnetic induction. Magnetic Flux; change in magnetic flux between two configurations. Faraday's Law to calculate induced current.
12/2: 23.1-23.4 (.pdf): Applications of induced voltages / Faraday's Law, including ground fault interrupters. Motional EMF. AC voltage generators. Voltage transformers, and their role in electric power transmission/distribution. Lenz's Law. Eddy currents. The electric fields associated with induced EMF. Assorted final notes on lecture material we did not get to (inductors; Maxwell's equations; and notes on AC voltages and currents).