1.1 Circuit Composition and Operating Status+ 1.2 Fundamental ideal component1+ 1.3 Fundamental ideal component 2+ 1.4 Basic Physical Quantities of Circuits 1+ 1.5 Basic Physical Quantities of Circuits 2+ 1.6 Basic Physical Quantities of Circuits 3+ 1.7 Basic Physical Quantities of Circuits 4+ 1.8 Voltage Source+ 1.9 Current Source+ 2.1 Resistor connection+ 2.2 Equivalent transformation of power supplies+ 2.3 Kirchhoff's law 1+ 2.4 Kirchhoff's law 2+ 2.5 The Stacking Principle+ 3.1 Three elements of sinusoidal alternating current + 3.2 Phase difference and representation of alternating current+ 3.3 Load Characteristics and Function of Single Parameter AC Circuits1+ 3.4 Load Characteristics and Function of Single Parameter AC Circuits2 + 3.5 Load Characteristics and Function of Single Parameter AC Circuits3 + 3.6 Power of sinusoidal alternating current+ 3.7 Power factor of sinusoidal alternating current+ 4.1 Generation of three-phase power+ 4.2 Connection of three-phase power supply+ 4.3 Star connection for three-phase loads+ 4.4 Triangular connection of three-phase loads+ 4.5 Power of three-phase alternating current+ 5.1 Forms and prevention of electrocution+ 5.2 Electrical protection + 5.3 Electricity Safety and First Aid for Electricity Shock+