Physics II
Electric fields, Gauss's law, potential, capacitors, current and circuits.
Textbook: Physics for Scientists and Engineers, 9th Edition (2014) by John W. Jewett, Jr. and Raymond A. SERWAY, BROOKS/COLE CENGACE learning.
- Week 1Electric Fields: Properties of Electric Charges, Insulator and Conductors, Coulomb`s Law, The Electric Field
- Electric charge, Coulomb's law and the field of point chargesThe basic properties of charge, the difference between conductors and insulators, the Coulomb force, and adding the fields of several point charges as vectors. The foundation of every calculation this semester.
- Week 2Electric Fields: Electric Field of a Continuous Charge Distribution, Electric Field Lines, Motion of Charged Particles in a Uniform Electric Field.
- Continuous charge distributions, field lines and motion in a uniform fieldFinding the electric field of a rod, ring and disk by integration, reading field lines, and solving the motion of a charged particle in a uniform field with kinematics.
- Week 3Gauss`s Law: Electric Flux, Gauss, s Law, Application of Gauss`s Law to Charged Insulator.
- Electric flux and Gauss's law: applications to insulatorsWhat flux is, why Gauss's law works, and how to find the field of a sphere, an infinite line and an infinite sheet in two lines without integrating.
- Week 4Gauss`s Law: Conductors in Electrostatic Equilibrium, Experimental verification of Gauss`s Law.
- Conductors in electrostatic equilibriumWhy the field inside a conductor is zero, why excess charge collects on the surface, what the field is just outside the surface, and how to find the inner and outer surface charges in concentric sphere-and-shell problems.
- Week 5Electric Potential: Potential Difference and Electric Potential, Potential Differences in a Uniform Electric Field
- Potential difference and potential in a uniform fieldElectric potential, potential difference, the volt and the electron volt; ΔV = −E·d in a uniform field and problems on accelerating charges.
- Week 6Electric Potential: Electric Potential and Potential Energy Due to Point Charges, Obtaining the Value of the Electric Field From the Electric Potential.
- Potential of point charges, potential energy and finding E from VScalar addition with V = kq/r, the potential energy of charge systems, and going from potential to field with E = −∇V.
- Week 7Electric Potential: Electric Potential Due to Continuous Charge Distributions, Electric Potential Due to a Charged Conductor, The Millikan Oil-Drop Experiment, Applications of Electro Statics.
- Potential of continuous distributions, charged conductors and the Millikan experimentV = k∫dq/r for the potential of a ring, disk and rod, why a charged conductor is an equipotential, the sharp-tip effect, and the Millikan oil-drop experiment.
- Week 8Capacitance and Dielectrics Ch 26, Definition of Capacitance, Calculating Capacitance, Combination of Capacitors
- Capacitance: parallel-plate, cylindrical, spherical, and series-parallel combinationsThe definition of capacitance, the C formulas for three classic geometries, and reducing capacitor networks step by step. An almost certain circuit question on the midterm comes from here.
- Week 9Capacitance and Dielectrics Ch 26, Energy Stored in a Capacitors with Dielectrics, Electric Dipole in an Electric Field
- Energy in a capacitor, dielectrics and the electric dipoleThe energy stored in a capacitor and the energy density, how C, V, Q and U change when a dielectric is inserted, and the torque and potential energy of a dipole in a uniform field.
- Week 10Capacitance and Dielectrics Ch 26, An Atomic Description of Dielectrics.
- Atomic description of dielectrics and midterm reviewExplains why the field inside a dielectric drops by a factor κ using polarization and induced surface charge, then collects the formulas of weeks 1-9 in one table and gives mixed midterm questions.
- Week 11Current and Resistance Ch 27, Electric Current, Resistance and Ohm`s Law,
- Electric current, resistance and Ohm's lawThe definition of current, current density, how resistance depends on geometry (R = ρL/A), and Ohm's law. All the circuit topics are built on the four formulas on this page.
- Week 12A Model For Electric Conduction.Resistance and Temperature, Superconductors, Electric Energy and Power.
- The conduction model, temperature dependence of resistance and electric powerDrift velocity, mean free time, the rise of R with temperature, superconductors and P = IΔV. Questions on bulb brightness and energy bills come from here.
- Week 13Direct Current Circuits: Electromotive Force, Resistors in Series and in Parallel.
- EMF, internal resistance and series-parallel resistorsThe terminal voltage of a real battery, maximum power transfer, equivalent resistance, and the sharing of current and voltage. Before moving on to Kirchhoff, most circuits are solved with this method.
- Week 14Kirchhoff`s Rules, RC Circuits. charging a capacitor, discharging a capacitor, the galvanometer, the ammeter, the voltmeter.
- Kirchhoff's rules, RC circuits, ammeter and voltmeterSolving circuits that cannot be reduced with the junction and loop rules, the charging and discharging curves of a capacitor, and making an ammeter and a voltmeter from a galvanometer. The topic worth the most points at the end of the semester.