Circuits become dynamic with the introduction of energy storage elements: Physical principles of capacitors and inductors. First-order ( RLcap R cap L RCcap R cap C

Real-world power systems operate primarily in alternating current (AC). Perfetti simplifies this using complex numbers: The concept of phasors and complex impedance/admittance.

These won't replace Perfetti's unique style, but they can supplement missing chapters.

Circuit theory is heavily dependent on the passive sign convention. Misplacing a single positive or negative sign at the beginning of a matrix or node equation will ruin the entire calculation.

Conservation of charge at circuit nodes.