Circuit diagrams are visual representations of electrical circuits, showing how components are connected. They use standardized symbols to represent elements like resistors, capacitors, and batteries, making it easier to understand the flow of electricity. These diagrams help engineers and technicians design, analyze, and troubleshoot circuits effectively. In a circuit diagram, lines represent wires that connect the components, while the arrangement indicates the circuit's layout. By following the diagram, one can determine how electricity travels through the circuit and identify potential issues. Circuit diagrams are essential tools in electronics, aiding in both education and practical applications.