For AC measurements, the reactive component of impedance may be more important than the resistive.
"Interference of reactive components of an electromagnetic field".
Other more complex laws may be needed if the network contains nonlinear or reactive components.
In the open-mold process, two reactive components are mixed and poured into an open mold.
On light loads, the power drawn by induction motors has a large reactive component and the power factor has a low value.
The reactive component of the near-field can give ambiguous or undetermined results when attempting measurements in this region.
This is different from reflection-less matching only when the source or load have a reactive component.
It should be clear from the basic theory of chapter 5 that, to implement filtering, a circuit must include at least one reactive component.
At some point between an adjacent maximum and minimum the real part of the impedance is but there is an associated reactive component.
Passive filters use resistors combined with reactive components such as capacitors and inductors.