Bioimpedance and Bioelectricity Basics, 3rd Edition

9.2. Equations, Laws, and Equivalent Circuits

A mathematical equation is also a model, and a very ideal one. There is an important interaction between these two model forms: the mathematical equation and the equivalent circuit diagram, with respect to the phenomena to be described.

9.2.1. Coulombs Law

See Section 3.1.1.

9.2.2. Maxwell–Heaviside Equations

Maxwell's famous four equations are found in many versions, for example, in differential or integral form and with different parameters involved. Equations 9.1–9.4 show one example set (the Minkowski formulation). The differential form relates the time and space derivatives at a point (in an infinitesimal small volume) to the current density at that point. The integral form relates to a defined finite ...