Ampere per Volt Unit | All you need to know
The ampere per volt (A/V) is a unit of electric conductance equal to one siemens. It directly expresses the relationship between electric current and voltage, indicating how much current flows through a conductor for each volt of applied potential difference. Although the SI-derived unit siemens is preferred in modern practice, the ampere per volt remains an equivalent expression of conductance.
What Is an Ampere per Volt?
The ampere per volt (symbol: A/V) is a unit of electric conductance equal to 1 siemens. Since electrical conductance is defined as the ratio of electric current to voltage, one ampere per volt is exactly equivalent to one siemens.
This unit is derived directly from Ohm's law and is commonly used when expressing conductance in terms of its defining SI base units rather than by its derived name.
History of the Ampere per Volt
As electrical engineering developed, conductance was often expressed using derived forms such as the reciprocal ohm and ampere per volt. To simplify terminology and standardize measurements internationally, the International Electrotechnical Commission (IEC) adopted the siemens as the official SI-derived unit of electrical conductance in 1971. Today, ampere per volt is primarily used as an equivalent expression rather than as a preferred unit name.
Current Uses of the Ampere per Volt
The ampere per volt is used in electrical engineering, circuit theory, scientific research, and educational materials where the relationship between current and voltage is emphasized. Most modern technical standards, however, use the unit name siemens instead.
Ampere per Volt Conversion
One ampere per volt is equal to:
- 1 siemens (S)
- 1 mho (obsolete)
- 1 reciprocal ohm (Ω⁻¹)
- 1,000 millisiemens (mS)
You can use ChangeUnit to convert ampere per volt to siemens, mho (obsolete), reciprocal ohm, and many other electric conductance units.