Physics Ontology

One map of physics, three ways in. Drill down on any quantity to see its units, the equations it lives in, and how its values span the universe.

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Electromagnetism

Conductance

Ease with which current flows; inverse of resistance.

SI unit

siemens (S)

Dimension: [ M−1L−2T3I2 ][\,M^{-1} L^{-2} T^3 I^2\,]

Other units

  • siemens (S)

Order of magnitude

How values of conductance span the physical world (in S, log scale).

Glass insulator
10-14 S
Copper wire
102 S
Lower limit10-16 SUpper limit108 S