What type of current is influenced by temperature variations and changes in resistivity?

Dynamic currents are characterized by their variability, which can be influenced by environmental factors, including temperature variations and changes in resistivity. These currents are not constant; they can fluctuate based on external conditions. For instance, as temperature changes, the resistivity of materials can also change, which directly affects the flow and characteristics of the dynamic current.

Dynamic currents are often seen in various applications, including those related to corrosion and cathodic protection systems, where external conditions can significantly impact the performance and behavior of the currents involved. Understanding this relationship is crucial for ensuring effective corrosion control measures and analyzing the electrical behavior of different systems.

The other options mentioned relate to different phenomena. Steady state currents remain constant over time and are not influenced by such variable conditions, while telluric and volcanic currents pertain to geological phenomena and are not primarily based on resistivity changes due to temperature variations in the same context as dynamic currents.