What does a 'circuit diagram' typically include?

A circuit diagram primarily includes symbols that represent various electrical components and the connections between them. These symbols are standardized within the electrical engineering field, allowing anyone familiar with these diagrams to easily understand the layout and function of the circuit. This visual representation helps in both designing and analyzing electrical circuits, making it easier for engineers and technicians to communicate ideas about the circuit's operation and troubleshoot issues when they arise.

In contrast, other options focus on aspects not typically present in a circuit diagram. For instance, while descriptions of component functions or assembly guides may be useful in certain contexts, they fall outside the scope of what a circuit diagram is designed to convey. Circuit diagrams are concerned with the physical arrangement and connectivity of components rather than detailed operational descriptions or assembly instructions.