Conductivity/conductivity

Conductivity is the ability of substances to transport energy, other substances or particles. There are several forms of conductivity in different areas of physics.

Thermal conductivity plays a special role in thermodynamics. It depends on the material and is used to calculate the heat flow density. In simple terms, thermal conductivity expresses the amount of heat that flows through a 1m thick layer of material with a surface area of 1m² in 1s at a temperature difference of 1K.

Electrical conductivity or conductivity is the reciprocal of the specific resistance. It increases with the number of freely moving charge carriers in the material and is given by the ratio of current strength to applied voltage. The

magnetic conductivity or permeability (H/m or Vs/Am) determines how well the magnetic flux is conducted in a substance. Dielectric conductivity or permittivity (F/m) describes the ability of substances to conduct electric fields. Other areas in which forms of conductivity occur are hydraulic conductivity (permeability for liquids or gases) or acoustic conductivity (conductivity of sound). (All information without guarantee)