The paper presents the previously unreported properties of current-carrying conductors in the low frequency region utilizing impedance spectroscopy. The studied objects have an additional low frequency impedance during the passage of an electric current. The bias-induced impedance (ZBI) is noticeably manifested in the range of 0.01 - 100 Hz and has either capacitive or inductive nature or both types, depending on the bias level (current density) and material types. The experiments in this work were done using wires made of pure metals, alloys, and non-metal conductors, such as graphite rods. These objects showed the ZBI-effect that distinguishes them from other objects, such as standard resistors of the same rating, in which this phenomenon does not occur. The ZBI-effect was modeled by equivalent circuits. Understanding the nature of this effect can give impetus to the development of a new type of instruments in various fields.
