Faraday's law of induction
E31559
Faraday's law of induction is a fundamental principle of electromagnetism that relates changing magnetic flux through a circuit to the induced electromotive force (voltage) in that circuit.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Faraday's law of induction canonical | 6 |
| Maxwell–Faraday equation | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T244216 — 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: Faraday's law of induction Context triple: [Maxwell's equations, consistsOf, Faraday's law of induction]
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A.
Maxwell's equations
Maxwell's equations are the fundamental set of four equations in classical electromagnetism that describe how electric and magnetic fields are generated and interact with charges and currents.
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B.
Gauss’s law
Gauss’s law is a fundamental principle of electromagnetism that relates the electric flux through a closed surface to the electric charge enclosed within that surface.
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C.
Newton's second law of motion
Newton's second law of motion is a fundamental principle stating that the net force acting on an object equals the rate of change of its momentum, commonly expressed as F = ma for constant mass.
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D.
London equations
The London equations are fundamental relations in superconductivity that describe how magnetic fields behave inside superconductors, capturing key features like the Meissner effect and zero electrical resistance.
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E.
A Treatise on Electricity and Magnetism
A Treatise on Electricity and Magnetism is James Clerk Maxwell’s foundational 19th-century work that systematically formulated the classical theory of electromagnetism, including the famous Maxwell’s equations.
- 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: Faraday's law of induction Target entity description: Faraday's law of induction is a fundamental principle of electromagnetism that relates changing magnetic flux through a circuit to the induced electromotive force (voltage) in that circuit.
-
A.
Maxwell's equations
Maxwell's equations are the fundamental set of four equations in classical electromagnetism that describe how electric and magnetic fields are generated and interact with charges and currents.
-
B.
Gauss’s law
Gauss’s law is a fundamental principle of electromagnetism that relates the electric flux through a closed surface to the electric charge enclosed within that surface.
-
C.
Newton's second law of motion
Newton's second law of motion is a fundamental principle stating that the net force acting on an object equals the rate of change of its momentum, commonly expressed as F = ma for constant mass.
-
D.
London equations
The London equations are fundamental relations in superconductivity that describe how magnetic fields behave inside superconductors, capturing key features like the Meissner effect and zero electrical resistance.
-
E.
A Treatise on Electricity and Magnetism
A Treatise on Electricity and Magnetism is James Clerk Maxwell’s foundational 19th-century work that systematically formulated the classical theory of electromagnetism, including the famous Maxwell’s equations.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Maxwell equation
ⓘ
law of electromagnetism ⓘ physical law ⓘ |
| appliesTo |
closed loops
ⓘ
electrical circuits ⓘ |
| assumes | classical electromagnetism ⓘ |
| componentOf | Maxwell's equations ⓘ |
| coreConcept | electromagnetic induction ⓘ |
| describes | non-conservative electric fields produced by changing magnetic fields ⓘ |
| differentialForm | ∮_C E · dl = - d/dt ∫_S B · dA ⓘ |
| dimension | macroscopic scale ⓘ |
| domain | classical physics ⓘ |
| expresses | induction of emf by time-varying magnetic field ⓘ |
| field | electromagnetism ⓘ |
| foundationFor |
AC power generation
ⓘ
transformer theory ⓘ |
| historicalDiscoveryBy | Michael Faraday ⓘ |
| implies | changing magnetic fields create electric fields ⓘ |
| includesPrinciple | Lenz's law ⓘ |
| includesSymbol |
B
ⓘ
emf ⓘ t ⓘ Φ_B ⓘ ∂B/∂t ⓘ ∮ ⓘ |
| integralForm | ∮_C E · dl = - dΦ_B/dt ⓘ |
| mathematicalFormulation | emf = - dΦ_B/dt ⓘ |
| namedAfter | Michael Faraday ⓘ |
| relatedConcept |
magnetic flux linkage
ⓘ
mutual inductance ⓘ self-inductance ⓘ |
| relates |
changing magnetic flux
ⓘ
induced electromotive force ⓘ induced voltage ⓘ |
| relatesQuantity |
electric field
ⓘ
magnetic field ⓘ magnetic flux ⓘ time derivative of magnetic flux ⓘ |
| signConvention | negative sign indicates opposition to change in flux ⓘ |
| usedIn |
electric generators
ⓘ
electric guitar pickups ⓘ induction cooktops ⓘ induction motors ⓘ inductors ⓘ magnetic braking systems ⓘ microphone coils ⓘ transformers ⓘ wireless charging systems ⓘ |
| validIn | non-relativistic regimes ⓘ |
| yearProposed | 1831 ⓘ |
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: Faraday's law of induction Description of subject: Faraday's law of induction is a fundamental principle of electromagnetism that relates changing magnetic flux through a circuit to the induced electromotive force (voltage) in that circuit.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Maxwell–Faraday equation