In 1785, Coulomb discovered the electrical conductivity of air.

In another case, researchers report that bismuth telluride has high electrical conductivity of 1.1 105 S m m2 with its very low lattice thermal conductivity of 1.20 W (m K), similar to ordinary glass.

This fluid, which has a high electrical conductivity, is sometimes called a water ammonia ocean.

The theory of metals in their solid state helps to explain the unusually high electrical conductivity of copper.

When helium II boils, due to its high thermal conductivity it does not bubble but rather evaporates directly from its surface.

Conductivity File Lightning over Oradea Romania cropped.jpg_right_thumb_alt Four bolts of lightning strike the ground_A lightning discharge consists primarily of a flow of electrons.

The Lorentz force density is roughlywhere formula_3 is the electrical conductivity of the fluid, formula_4 its velocity, and formula_5 the magnitude of the magnetic field.

According to Fourier's law, the heat flow between the bodies is found by the relation where formula_2 is the heat flow, formula_3 is the thermal conductivity, formula_4 is the cross sectional area and formula_5 is the temperature gradient in the direction of flow.