A Calculable Standard of Capacitance
- 1 April 1965
- journal article
- Published by IOP Publishing in Metrologia
- Vol. 1 (2) , 36-55
- https://doi.org/10.1088/0026-1394/1/2/002
Abstract
A calculable standard of capacitance has been constructed in the form of a variable cylindrical cross-capacitor. The value defined by the standard is the change in capacitance due to the linear displacement of one screening electrode relative to another, and this displacement is measured in wavelengths of light (Hg green, λ 5462) by means of a built-in Fabry-Perot interferometer. The capacitance interval has a nominal maximum of 0.25 pF. The estimated accuracy of a capacitance determination by means of the standard is 1 in 107 when the value is expressed in e.s.u. The present uncertainty in the value assumed for the velocity of light limits the accuracy of a result expressed in e.m.u. to 1 in 106.Keywords
This publication has 11 references indexed in Scilit:
- DETERMINATION OF AN ABSOLUTE SCALE OF CAPACITANCECanadian Journal of Physics, 1964
- Evaluation of the NBS Unit of Resistance Based on a Computable Capacitor.Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1961
- The Precision Measurement of Transformer RatiosIRE Transactions on Instrumentation, 1960
- Some results on the cross-capacitances per unit length of cylindrical three-terminal capacitors with thin dielectric films on their electrodesProceedings of the IEE Part C: Monographs, 1960
- The Precise Measuremient of Small CapacitancesIRE Transactions on Instrumentation, 1958
- New Apparatus at the National Bureau of Standards for Absolute Capacitance MeasurementIRE Transactions on Instrumentation, 1958
- A new determination of the free-space velocity of electromagnetic wavesProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958
- A new theorem in electrostatics with applications to calculable standards of capacitanceProceedings of the IEE Part C: Monographs, 1957
- A New Theorem in Electrostatics and its Application to Calculable Standards of CapacitanceNature, 1956
- Lamps and wavelengths of mercury 198Journal of Research of the National Bureau of Standards, 1950