Conductance

#Physics

$\displaystyle \sigma=\frac{1}{\rho}$

• $\displaystyle \rho$ is the Resistivity of the material

$\displaystyle \sigma=\frac{nf\lambda q^{2}}{2mv_{\text{thermal}}}$

• Conductance of a wire
• $\displaystyle n$ is the number of molecules per unit volume
• $\displaystyle f$ is the number of free electrons per molecule
• $\displaystyle \lambda$ is the average distance between collisions of electrons with nuclei