किसी चालक की वैद्युत धारिता, उस चालक की वैद्युत आवेश का संग्रहण करने की क्को आवेश दिया जाता है तो उसका वैद्के्े विभव में V वृद्धि हो, तो

Q अनुक्रमानुपाती V

Q= CV

Capacitance is the capability of a material object or device to store electric charge. It is measured by the charge in response to a difference in electric potential, expressed as the ratio of those quantities. Commonly recognized are two closely related notions of capacitance: self capacitance and mutual capacitance. An object that can be electrically charged exhibits self capacitance, for which the electric potential is measured between the object and ground. Mutual capacitance is measured between two components, and is particularly important in the operation of the capacitor, an elementary linear electronic component designed to add capacitance to an electric circuit.