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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| R_K canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6938959 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: R_K Context triple: [von Klitzing constant, symbol, R_K]
-
A.
RK
RK is the commonly used abbreviation for the Riigikogu, the unicameral national parliament of Estonia.
-
B.
RK
RK is the vehicle registration code used for the town of Ružomberok in northern Slovakia.
-
C.
RKR
RKR is the vehicle registration code assigned to vehicles registered in the Rymanów area of Poland.
-
D.
RKA
RKA is the Russian Space Agency that managed Russia’s human spaceflight activities, including operations of the Mir space station.
-
E.
RKP
RKP is the Swedish abbreviation for the Swedish People’s Party of Finland, a liberal-centrist political party representing the Swedish-speaking minority in Finland.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: R_K Target entity description: 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.
-
A.
RK
RK is the commonly used abbreviation for the Riigikogu, the unicameral national parliament of Estonia.
-
B.
RK
RK is the vehicle registration code used for the town of Ružomberok in northern Slovakia.
-
C.
RKR
RKR is the vehicle registration code assigned to vehicles registered in the Rymanów area of Poland.
-
D.
RKA
RKA is the Russian Space Agency that managed Russia’s human spaceflight activities, including operations of the Mir space station.
-
E.
RKP
RKP is the Swedish abbreviation for the Swedish People’s Party of Finland, a liberal-centrist political party representing the Swedish-speaking minority in Finland.
- F. None of above. chosen
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 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: R_K Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.