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Statmho

Statmho is an obsolete unit of electrical conductance in the centimeter-gram-second electrostatic (cgs-esu) system of units. It is the reciprocal of the statohm, the unit of electrical resistance in the same system. Conductance is a measure of how easily electric current flows through a substance.

The statmho is related to the more commonly used SI unit of conductance, the siemens (S), as follows:

1 statmho ≈ 1.113 × 10-12 S

Since the statmho and statohm belong to the cgs-esu system, their definitions are based on electrostatic forces and charge distribution. The values in this system often involve factors related to the speed of light.

The unit is rarely used in modern science and engineering, having been largely replaced by the siemens within the SI system. Its primary use was historical, within the context of theoretical electromagnetism and certain branches of physics where cgs-esu units were prevalent. Because of its impractical size relative to typical conductances encountered in everyday applications and the adoption of the SI system, the statmho is now largely of historical interest.