What is a trace on a circuit board?

A trace on a circuit board is specifically defined as a wire connecting two components. Traces are conductive pathways made from materials like copper, which are etched onto the surface of the board. They serve the crucial function of facilitating the electrical connections between different components such as resistors, capacitors, and integrated circuits. This design allows for the efficient routing of electrical signals and power throughout the circuit board, enabling the functioning of electronic devices.

The other options provided do not accurately describe what a trace is. A label for the device identifies the circuit board but does not play a role in the electrical connections. An insulating material serves to separate conductive traces and prevent unintended connections, but it is not the conductive element itself. A power source refers to the origin of electrical energy supplied to the circuit but does not encompass the role of traces in interconnecting components. Therefore, the definition that identifies a trace as a wire connecting two components captures its essential function in circuit design.