Ohm’s and Kirchhoff’s laws. Series and parallel connections. Voltage and current division. Nodal and mesh analysis. Superposition theorem. Thevenin’s and Norton’s theorems. Source transformation. Maximum power transfer. Inductance and capacitance. Behavior of R, L and C under steady-state DC or AC conditions. Characteristics of sinusoids. The phasor concept. Phasor relationships for R, L, and C elements. Impedance and admittance. Effective values of current and voltage. Instantaneous, average and apparent power. Power factor. Resonance. Three-phase systems. Three-phase wye and delta connections. Introduction to semiconductors. The PN junction. Diode characteristics. Applications of diodes: switches, rectifiers, etc. Transistors: operation, model, voltage-current characteristics. Applications of transistors: amplifiers, switches, etc. Operational Amplifiers. Safety considerations. Protective grounding.