R_K
E628623
R_K is the von Klitzing constant, a fundamental physical constant that characterizes the quantized Hall resistance and underpins the modern definition of the ohm.
Statements (35)
| Predicate | Object |
|---|---|
| instanceOf |
fundamental constant
ⓘ
physical constant ⓘ |
| dependsOnConstant |
Planck constant
NERFINISHED
ⓘ
elementary charge ⓘ |
| describes | quantized Hall resistance ⓘ |
| fixedBy | 2019 redefinition of SI base units ⓘ |
| hasAlternativeName | von Klitzing constant NERFINISHED ⓘ |
| hasApproximateValue |
2.581280745 × 10^4 ohms
ⓘ
25812.80745 ohms ⓘ |
| hasCategory |
electromagnetic constant
ⓘ
quantum electrical standard ⓘ |
| hasCODATAStatus | exact in the revised SI ⓘ |
| hasDefinition | ratio of Planck constant to the square of the elementary charge ⓘ |
| hasDimension | electrical resistance ⓘ |
| hasFormula | R_K = h / e^2 ⓘ |
| hasPhysicalQuantityType | electrical resistance ⓘ |
| hasSIUnit | ohm ⓘ |
| hasUncertainty | zero (by definition in revised SI) ⓘ |
| isExactSince | 2019 ⓘ |
| isInverselyProportionalTo | square of elementary charge ⓘ |
| isProportionalTo | Planck constant NERFINISHED ⓘ |
| measuredBy | quantum Hall devices ⓘ |
| namedAfter | Klaus von Klitzing NERFINISHED ⓘ |
| occursIn | Hall plateau resistance values ⓘ |
| relatedConstant | von Klitzing resistance quantum NERFINISHED ⓘ |
| relatedToEffect | quantum Hall effect ⓘ |
| symbol | R_K ⓘ |
| underpinsDefinitionOf |
SI unit of electrical resistance
ⓘ
ohm ⓘ |
| usedFor |
quantum standard of resistance
ⓘ
realization of the ohm ⓘ |
| usedIn |
condensed matter physics
ⓘ
electrical standards ⓘ metrology ⓘ precision measurements ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.