Scientific Ontology

\rho

Electromagnetism

Resistivity

Material property governing resistance of a conductor.

ohm metre (Ω·m)

Dimension: $[\,M L^3 T^{-3} I^{-2}\,]$

How values of resistivity span the physical world (in Ω·m, log scale).

Copper

1.70 × 10^-8 Ω·m

Glass

10¹² Ω·m

Lower limit10^-8 Ω·mUpper limit10¹⁶ Ω·m

Resistivity

R = \dfrac{\rho l}{A}