Abmho (CGS-EMU) Unit | All you need to know
The abmho (CGS-EMU) is a historical unit of electric conductance used in the centimetre-gram-second electromagnetic (CGS-EMU) system. It is defined as the reciprocal of the abohm and was once used in electromagnetic theory and electrical engineering before SI units became the international standard. Today, it survives mainly in historical literature and specialized research involving the CGS-EMU system.
What Is an Abmho (CGS-EMU)?
The abmho (CGS-EMU) is a unit of electric conductance in the electromagnetic CGS system. It measures how easily electric current flows through a conductor and is the reciprocal of the abohm. One abmho is equivalent to 109 siemens, making it an extremely large conductance unit compared with SI units.
Although the abmho played an important role in early electromagnetic measurements, modern engineering and scientific work almost exclusively use the siemens.
History of the Abmho (CGS-EMU)
The abmho originated in the CGS electromagnetic system, which was widely used during the development of classical electromagnetism. The CGS-EMU system simplified many electromagnetic equations, but it was gradually replaced by the International System of Units (SI), which standardized electrical measurements using the siemens.
Current Uses of the Abmho (CGS-EMU)
Today, the abmho is rarely used outside historical physics texts, legacy engineering documents, and specialized research involving CGS-EMU formulations. Modern conductance measurements are almost universally reported in siemens and its SI multiples.
Abmho (CGS-EMU) Conversion
One abmho (CGS-EMU) is equal to:
- 1,000,000,000 siemens (S)
- 1,000,000,000 ampere per volt (A/V)
- 1,000 megasiemens (MS)
- 8.98755179 × 1020 statmho (CGS-ESU)
You can use ChangeUnit to convert abmho (CGS-EMU) to siemens, ampere per volt, megasiemens, and many other electric conductance units.