abvolt

{{Short description|Unit of voltage}}

{{Infobox

| above = abvolt

| label2 = Unit system | data2 = CGS-EMU

| label3 = Unit of | data3 = electric potential, electric potential difference (voltage), and electromotive force

| label4 = Symbol | data4 = abV

| label5 = Named after | data5 = Alessandro Volta

| label6 = In CGS base units | data6 = g{{sup|1/2}}·cm{{sup|3/2}}/s{{sup|2}} {{cite book |last1=Gyllenbok |first1=Jan |title=Encyclopaedia of Historical Metrology, Weights, and Measures: Volume 1 |date=2018 |publisher=Birkhäuser |isbn=978-3-319-57598-8 |language=en}}^{:[https://books.google.com/books?id=XnRVDwAAQBAJ&dq=%22Encyclopaedia%20of%20Historical%20Metrology%2C%20Weights%2C%20and%20Measures%22%20vol%201&pg=PA25 25]}

| header7 =Conversions

| data8 = {{val|1|u=abV}} in ...... corresponds to ...

| label9 = SI derived units | data9 = {{val|e=-8|ul=volt}}

| label10 = CGS-ESU

| data10 = 1/{{math|c}}{{sub|cgs}} statvolt{{refn|group="Note"|name="cCGC"|The dimensionless constant {{math|c}}{{sub|cgs}} {{=}} {{val|2.99792458e10}} is numerically equal to the magnitude of the speed of light when the latter is expressed in {{val|u=cm/s}}.}}

}}

The abvolt (abV) is the unit of potential difference in the CGS-EMU system of units. It corresponds to {{val|e=-8|u=volt}} in the SI system and 1/{{math|c}}{{sub|cgs}} statvolt ≈ {{val|3.3356e-11|u=statvolt}} in the CGS-ESU system.{{refn|group="Note"|name="cCGC"}}

A potential difference of 1 abV will drive a current of one abampere through a resistance of one abohm.

In most practical applications, the volt and its multiples are preferred. The national standard in the United States IEEE/ASTM SI 10-2002.

American National Standard for Use of the International System of Units (SI): The Modern Metric System.

New York: IEEE, 30 December 2002, Section 3.3.3. deprecates the use of the abvolt, suggesting the use of volts instead.

The name abvolt was introduced by Kennelly in 1903 as a short name for the long name (absolute) electromagnetic cgs unit of e.m.f. that was in use since the adoption of the cgs system in 1875.A.E. Kennelly (1903) [https://dokumen.tips/documents/magnetic-units-and-other-subjects-that-might-occupy-attention-at-the-next-international.html "Magnetic units and other subjects that might occupy attention at the next international electrical congress"] 20th Annual Convention of the American Institute of Electrical Engineers, 1903 The abvolt was coherent with the CGS-EMU system, in contrast to the volt, the practical unit of e.m.f. that had been adopted too in 1875.