ARRL Technician Practice Exam 2025 - Free Technician License Practice Questions and Study Guide.

In circuit diagrams, components are interconnected by representation of connections. This means that the diagram utilizes lines and symbols to visually depict how each component in the circuit is connected to one another. The lines represent wires or paths through which electrical current can flow, while the symbols indicate the different electronic components such as resistors, capacitors, diodes, and others.

This form of representation is crucial as it allows anyone reading the diagram to understand the circuit's design and functionality without needing to see the actual physical components or their arrangement. Through these symbolic representations, important details like the sequence of connections and the relationship between different components are made clear.

The other options do not accurately reflect how components are interconnected in circuit diagrams. Physical size, electrical resistance, and color coding are not methods used in circuit design to indicate interconnections and can serve different purposes in electronics, but they do not convey the actual connectivity within the schematic itself.