What do schematics demonstrate in relation to an electrical system?

Schematics are critical tools in understanding electrical systems as they provide a visual representation of the connections and functions within that system. They depict how different components are interconnected, including power sources, loads, and other elements, enabling one to see the path of electrical flow and the relationships between various parts of the system. This allows for easier troubleshooting, designing, and analyzing of the system's functionality.

While potential energy, physical structure, and wire sizes are important aspects of electrical systems, these are not the primary focus of a schematic. The schematic's main purpose is to convey the conceptual layout and operational logic of the system rather than its physical attributes or the specifications of the individual components. Thus, the value of schematics lies in their ability to illustrate the electrical connections and functional relationships.