Which statement is true regarding electrical schematics?

The statement regarding electrical schematics that is true is that they may include electrical parameters. Schematics are designed primarily to represent the basic components and connections within an electrical circuit, allowing engineers and technicians to understand the circuit's function at a glance. While some schematics do include specific electrical parameters such as voltage ratings, current specifications, and other relevant values, it is not a requirement for all schematics. This flexibility is useful for documenting and designing circuits without overcrowding the diagram with excessive information.

In contrast, statements suggesting that schematics always show voltage, current, and resistance are overly rigid as these elements may not be relevant or necessary for every schematic. Furthermore, while many schematics do illustrate wiring connections, there are types of diagrams—such as simplified block diagrams—that may not depict these connections explicitly. Finally, the claim that schematics are only used for AC circuits is inaccurate, as schematics can represent both AC and DC circuits, allowing for a wide range of applications in electrical engineering.