Johtuman

Johtuman is a Finnish term that translates to "conductivity" in English. It refers to the ability of a material to conduct electric current. This property is a fundamental characteristic of all materials and is crucial in understanding their behavior in electrical circuits.

The conductivity of a material is influenced by several factors, including its atomic structure, temperature, and the presence of impurities. Materials with high conductivity, such as copper and silver, are known as conductors and are widely used in electrical wiring and electronic components. Conversely, materials with low conductivity, such as rubber and glass, are called insulators and are used to prevent the flow of electricity.

The inverse of conductivity is resistivity, which measures a material's opposition to electrical current. Both conductivity and resistivity are temperature-dependent. For most conductors, conductivity decreases as temperature increases, while for semiconductors, conductivity generally increases with temperature. Understanding johtuman is essential for designing and analyzing electrical systems, selecting appropriate materials for various applications, and troubleshooting electrical issues.