The mathematical counting method of 1000pf. Capacitance is generally three digits, the first and second digits are significant digits, the third digit is multiple, the nominal value is 102, and the capacity is: 10X 10 square = 1000pf. Capacitance, also known as "capacitance", refers to the amount of free charge stored under a given potential difference, which is recorded as C and the international unit is Farah (F). Generally speaking, charges are forced to move in an electric field. When there is a medium between conductors, it will hinder the movement of charges, leading to the accumulation of charges on conductors, resulting in the cumulative storage of charges. The stored charge is called capacitance, and any electrostatic field is composed of many capacitors. Where there is electrostatic field, there is capacitance, which is described by electrostatic field. It is generally believed that an isolated conductor and infinity constitute a capacitor, and the grounding of the conductor is equivalent to connecting to infinity and connecting to the earth as a whole.