|Physical quantity (s)||Inductance|
|system||International system of units|
|In SI units|
|Named after||Joseph Henry|
|Derived from||Volts , seconds , amps|
CGS system of units
- 1 abH = 10 −9 H = 1 nH (nanohenry)
The stathenry (statH) is the outdated unit of measure for inductance from the electrostatic CGS system of units . It applies
- 1 statH = c 2 · 10 −5 H ≈ 8.98755 · 10 11 H ≈ 899 GH (Gigahenry)
Before the introduction of the SI , today's SI Henry was referred to as the absolute Henry , while the Henry , which was derived from the definition of the (international) ohm at that time, was called the international Henry . Since the national standard authorities had determined different conversion factors based on the measurement regulations of the definitions, there were nationally different numerical values for the international Henry. The International Committee for Weights and Measures put 1946 firmly the average international ohms with 1.00049 Ω, which also applies:
- 1 medium international henry = 1 H int = 1,00049 H
The American international Henry was also significant:
- 1 U.S. International Henry = 1,000495 H.
The Henry was formerly also known as the quadrant , since 1 Henry also corresponds to the dimension according to the length of an earth quadrant of 10 9 cm.
Sources and individual references
- Peter Kurzweil: The Vieweg unit lexicon: formulas and terms from physics, chemistry and technology . Springer-Verlag, March 9, 2013, ISBN 978-3-322-92920-4 , p. 152.
- Electrical Engineers Handbook Electric Power , Harold Pender, William A. Del Mar, 1949, pp. 1-39.
- Gustav Benischke: The scientific foundations of electrical engineering , Springer-Verlag, Berlin / Heidelberg, 1907, p. 570.