Net current fields weaken directly with what factor?

The correct factor that weakens net current fields is distance. As the distance from the source of the current increases, the strength of the electromagnetic field diminishes. This behavior is described by the inverse-square law in physics, which states that the intensity of a physical quantity, such as an electric or magnetic field, is inversely proportional to the square of the distance from the source.

Thus, as one moves further away from the source of the current, the field strength decreases significantly. This principle is crucial when considering the design and installation of electrical systems, as it affects how equipment is positioned and how cable runs are planned to ensure signals remain strong and effective at their destination.

While temperature, humidity, and voltage can impact the performance of electrical systems, they do not directly relate to the weakening of net current fields in the context of distance from the source.