This book provides readers with the necessary background information and advanced concepts in the field of circuits at the crossroads between physics mathematics and system theory. It covers various engineering subfields such as electrical devices and circuits and their electronic counterparts. Based on the idea that a modern university course should provide students with conceptual tools to understand the behavior of both linear and nonlinear circuits to approach current problems posed by new cuttingedge devices and to address future developments and challenges the book places equal emphasis on linear and nonlinear twoterminal and multiterminal as well as active and passive circuit components.ampampnbspThis second volume focuses on dynamical circuits which are characterized by time evolution and by the concept of state.