Which symbol is used to represent a capacitor in a schematic circuit?

In schematic diagrams, each component is represented by a specific symbol to facilitate easy identification and understanding of the circuit design. The symbol for a capacitor is distinctly represented by the letter 'C'. This denotes its function within the circuit, allowing electricians and engineers to quickly recognize that a capacitor is present and understand its role in the circuit.

The other options represent different electrical components: 'R' symbolizes a resistor, which regulates current flow, while 'L' indicates an inductor, which stores energy in a magnetic field. The reference to '219.3 Q 12' does not correspond to a standard electrical symbol and is not used in circuit schematics, making it an irrelevant choice for representing a capacitor. Understanding these symbols is crucial for interpreting electrical schematics accurately and allows for effective communication among those in the field.