What information can you find on a schematic?

A schematic diagram is a representation that illustrates the components of a circuit and their interconnections. The key features of a schematic include the component name, the materials used, the physical location of components, and importantly, the electrical relationships between those components.

The correct choice emphasizes the comprehensive nature of a schematic. It defines how various components are related in terms of their electrical connections, which is critical for understanding how circuits function as a whole. Schematic diagrams ensure that one can deduce how power flows through a system and how various elements interact electrically.

In contrast, focusing solely on electrical relationships misses the broader set of information provided by a schematic, which includes the identification of components and their specifications. While circuit board layouts and component placements can be represented, schematics serve a more analytical purpose, offering a clear view of both relationships and component identities within the entire circuit. Thus, option B does not capture the full utility of what a schematic can provide.