Resistivity
Resistivity (also known as resistance coefficient, conductivity, is a physical material of the conductive material of the reaction material. The resistivity is numerically equal to the unit length, the resistance of a substance in the unit section, which is equal to the resistance of the material having a length of one meter and a cross section of one square meter. The reciprocal of resistivity is conductivity. The resistivity is independent of the length of the conductor, the cross-sectional area, and so on. It is the electrical nature of the conductor material itself, which is determined by the material of the conductor and is related to temperature. The unit of resistivity in the international unit system is Ω · m, read ohm meters, referred to as the ohm. Commonly used units are "ohm centimeters". Resistivity of the lower material is called the conductor, the common conductor is mainly metal, and the nature of the conductive is the best silver. Other non-conductive materials such as glass, rubber, etc., higher resistivity, commonly known as insulators. The material between the conductor and the insulator is called a semiconductor. The scientific symbol of resistivity is ρ. ...