The correct answer is: C. polarity marking.
A capacitor is an electrical device that stores energy in an electric field. It is made up of two conductive plates separated by an insulating material, called a dielectric. The dielectric can be air, paper, plastic, or other materials.
The capacitance of a capacitor is the amount of charge that it can store. The capacitance depends on the size of the plates, the distance between the plates, and the type of dielectric.
Capacitors are used in a variety of electronic devices, including radios, televisions, and computers. They are also used in power supplies, motors, and other industrial applications.
In single-phase capacitor motors, the capacitors are used to start the motor. The capacitors are connected in parallel with the start winding of the motor. When the motor is turned on, the capacitors provide a current that helps to turn the motor over. Once the motor is up to speed, the capacitors are disconnected from the circuit.
The capacitors used in single-phase capacitor motors have a definite value, voltage rating, and dielectric medium. They do not have a polarity marking.
A polarity marking is a symbol that indicates the positive and negative terminals of a component. Capacitors do not have polarity markings because they are symmetrical devices. The current can flow in either direction through a capacitor.
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