An element with this property stores energy equal to half its value times the square of the potential difference across the element.
In cgs units, for an isolated spherical conductor, this quantity is equal to the radius. A low-pass filter may be created by placing an element with this property in series with a shunt resistor and parallel with the load, since the reactance associated with this property varies as the signal period. A circuit with an element with this property in series with a resistance has an associated time constant given by this quantity times the resistance. An element with this property stores energy equal to half its value times the square of the potential difference across the element. FTP, name this quantity, defined as the ratio of potential difference to charge stored, and measured in MKS units of farads.
In cgs units, for an isolated spherical conductor, this quantity is equal to the radius.
capacitance (prompt on C)