Firstly, an argument is given for a simple electrical circuit, showing that the “unlimited” use of Ohm’s law leads to a contradiction with the theory of relativity, and a wave process has to be considered. The very presence of the electrical voltage v and current i, in a typical resistive dependence v = f(i) is associated with electrical and magnetic fields, or energies, which are inherent for capacitors and inductors. Thus, the common opinion that resistor does not accumulate electrical or magnetic energy is wrong, even the simplest circuits should be analyzed in view of the wave processes, for instance when a DC state is being established.

electromagnetic propagation, circuit analysis, electrical engineering education.