What symbol is typically used to indicate electrical connections on a schematic?

The symbol that is typically used to indicate electrical connections on a schematic is a circle. In schematic diagrams, a circle often represents the junction where two or more wires connect. This visual cue helps engineers and technicians quickly identify points where current can flow from one wire to another, facilitating the understanding of the circuit's layout and function. Using a circle for electrical connections provides a clear and universally recognized standard that enhances readability in schematics, making it easier for anyone interpreting the diagram to comprehend how the circuit operates and where connections are made. The other shapes, such as squares, triangles, and diamonds, are used for different purposes in circuit diagrams, and do not convey the same meaning regarding electrical connections.