This article explains very basic definition of What is a Capacitor ?, its main application and technologies.
Capacitors are passive electrical components to store electric energy
A capacitor is made from electrical conductive electrodes that are separated by an insulator. The insulating layer is called a dielectric. Although all capacitors share the same basic principle components, the material choice, configurations and features can vary widely.
A capacitor is able to store energy in an electrostatic field that is generated by a potential difference across the conducting electrodes. So when an electrode is subject to a voltage, one plate of the capacitor will collect positive charge while the other will be negatively charged. The ratio of this electric charge and the potential difference (voltage) is called the capacitance and it is expressed in farads. The leaking current through the dielectricis called the leakage current.
Applications – What is it good for ?
Capacitors are common elements in electrical circuits with number of applications and different requirements such as:
There are wide capacitor technologies that differ in features, behaviour, range of electrical parameters covered. The most common capacitor technologies include: