[PDF] Circuit Symbols of Electronic Components Energy is transferred between the coils by the magnetic field in the core. There is no electrical connection between the coils. Earth (Ground) A connection to earth. For many electronic circuits this is the 0V (zero volts) of the power supply, but for mains electricity and some radio circuits it Electrical Symbols | Electronic Symbols | Schematic symbols Capacitor Symbols; Capacitor: Capacitor is used to store electric charge. It acts as short circuit with AC and open circuit with DC. Capacitor: Polarized Capacitor: Electrolytic capacitor: Polarized Capacitor: Electrolytic capacitor: Variable Capacitor: Adjustable capacitance: Inductor / Coil Symbols; Inductor: Coil / solenoid that generates magnetic field[PDF] Schematic symbols are used to identify and Schematic symbols are used to identify and graphically depict the function of fluid power components. Recognizing and understanding schematic symbols will enable you to comprehend a circuit’s function. Schematic drawings document the machine logic only and are never to be used as a piping diagram.