Johtoisuus
Johtoisuus, often translated as conductivity, is a fundamental property of materials that describes their ability to conduct electric current. It is the inverse of resistivity, meaning a material with high electrical conductivity will have low electrical resistivity, and vice versa. The SI unit for electrical conductivity is siemens per meter (S/m).
In metals, electrical conductivity arises from the movement of free electrons. These electrons are not bound
Semiconductors exhibit conductivity between that of conductors and insulators. Their conductivity can be significantly altered by
Insulators, such as rubber or glass, have very low electrical conductivity because their electrons are tightly
The concept of thermal conductivity is also related, describing a material's ability to conduct heat. While