Capacitance is the ability of an object or component, such as a capacitor, to store electrical energy in an electric field. It is a measure of how much electric charge is stored for a given electric potential (voltage).
Capacitance (C) is defined as the ratio of stored charge (Q) to the applied voltage (V), with the farad (F) as its unit. This relationship is expressed by the formula: Q = CV.
Capacitance is also the operating principle behind technologies like capacitive touch panels. These devices function by detecting changes in capacitance. When a conductive object, such as a finger, touches the screen, it alters the local capacitance of the electrode grid. The system then identifies the location of the touch by pinpointing where on the grid this change occurred.
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