An electrical network, also called electric circuit or electrical circuit, refers to an interconnection of various active and passive components in a prescribed manner to form a closed path. The main types of electric circuits are open circuits, closed circuits, short circuits, series circuits, parallel circuits, and series parallel circuits. Network theory deals with the study of solving the problems related to electric networks or electronic networks. The process through which different electrical parameters of a circuit element connected in an electrical network are calculated is called network analysis. The circuit components such as resistors, capacitors, inductors, voltage sources, current sources can either be connected in series or in parallel combinations. Network analysis determines the different electrical parameters including current, voltage, resistance, impedance, reactance, inductance, capacitance, frequency, electric power and electrical energy. This book is a compilation of chapters that discuss the theory and analysis of electrical networks. It aims to serve as a resource guide for scholars and engineers in the fields of electronics and communication engineering as well as electrical engineering.