This is an introduction to electricity and strength of materials.
Syllabus |
Greek alphabet |
Synopsis |
The SI Unit System |
Lecture 1
Electric Charge, Current and Potential Difference
Microscopic picture of current in a wire
Conductors, Conductance and Conductivity
Resistors, Resistance and Resistivity
Conductors, Insulators and Semiconductors
Temperature coefficient of resistivity
Heating effect of current |
Current,Potential and Resistance |
Lecture 2
Circuit Elements and Electric Circuits
Electromotive force
Resistors connected in series
Resistors connected in parallel
Series/parallel substitution of resistors in circuits
Internal Resistance of an electric cell
Maximum power transfer theorem |
Circuits |
Lecture 3
Simple circuits are reduced to a single equivalent resistor by series and parallel substitution,
Kirchhoff's rules for finding currents and potential differences in networks are demonstrated |
Networks |
Lecture 4
the capacitance of two conducting surfaces
the effect of dielectrics (insulators) between the capacitor plates
the series and parallel combination of capacitors
the energy stored in a capacitor |
Capacitors |
Lecture 5
Skin Resistance
Hazardous currents
The Australian Electrical Supply
The Cleaning Lady and the Dog (A cautionary tale)
Circuit Breakers and Fuses
Switches
Competent Persons
Domestic Sockets and Plugs |
Electrical Safety |
Lecture 6
Negative Potential Energy
Potential Energy and Force
The Lenard-Jones Potential Energy Function
Equilibrium Separation
Maximum Binding Energy
The Electron Volt
|
Interatomic Potential Function |
Lecture 7
The Classification of Chemical Bonds
The Periodic Table with Electron Configurations
Ionic Bonds
Covalent Bonds
Metallic Bonds
Electric Dipoles
Hydrogen Bonds
Van der Waals Bonds |
Chemical Bonds |
Lecture 8
Crystal Structures
Body Centred Cubic Unit Cell
Face Centred Cubic Unit Cell
Hexagonal Close Packed Unit Cell
Diamond structure Unit Cell
Simple Cubic structure
Packing Density in the Unit Cell (FCC and BCC)
Ionic, Covalent and Metallic Crystals
Intermediate Bond types
Amorphous Solids
Polymers |
Microstructures |
Lecture 9
Point defects (Vacancies, Interstitials, Impurities),
Line defects (Edge and Screw Dislocations),
Planar defects (Grain, Tilt & Twin boundaries, Microcracks), and
Volume defects (Voids). |
Microscopic defects |
Lecture 10
Normal Stress, Shear Stress and Bulk Stress
Normal Strain, Shear Strain and Bulk Strain
Young's Modulus, Shear/Rigidity Modulus and Bulk Modulus
Poisson's ratio
Youngs Modulus and the Atomic Spring Constant |
Elasticity |
Lecture 11
Brittle solids and the critical distance for breaking a bond are introduced,
the homogeneous separation & microcrack models of brittle failure,
Plastic solids,
the homogeneous shear & dislocation models of plastic failure are compared. |
Brittle and Plastic |
Lecture 12
Solids, Fluids, Plastics & Plasmas
Two techniques of calculation with fluids
Four concepts of fluid flow
Streamlines
Equation of continuity
Bernoulli's equation
Fluid statics |
Fluids: Flowing and Static |
Lecture 13
Archimedes' achievements & death
Hiero's crown
Archimedes' principle |
Archimedes |
Lecture 14
Planar Laminar flow
Laminar flow of a fluid in a tube
Newton's law of Viscosity
Viscosity at the Atomic Level
Viscosity and Temperature
Viscosity and Time
Terminal Velocity
Stokes' Law and Terminal Speeds
Poiseuille's Law and Laminar flow in a tube
Reynold's number and Turbulent flow |
Viscosity |
Poiseuille's equation |
Derivation |
A few exam papers &/or tutorial questions with full worked solutions may be obtained for a small fee. Please email if you require assistance with this.