Lenz's law
E168347
Lenz's law is a fundamental principle of electromagnetism stating that an induced current or electromotive force always acts in a direction that opposes the change in magnetic flux that produced it.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lenz's law canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1463187 — 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: Lenz's law Context triple: [Faraday's law of induction, includesPrinciple, Lenz's law]
-
A.
Faraday's law of induction
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.
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B.
Ampère–Maxwell law
The Ampère–Maxwell law is one of Maxwell’s equations that relates magnetic fields to electric currents and changing electric fields, thereby introducing the concept of displacement current and enabling the prediction of electromagnetic waves.
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C.
Ampère's force law
Ampère's force law is a fundamental principle in electromagnetism that quantifies the mechanical force between electric currents in conductors.
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D.
Steinmetz’s law of hysteresis
Steinmetz’s law of hysteresis is an empirical formula that relates the energy loss in magnetic materials to the maximum magnetic flux density, widely used in electrical engineering to estimate core losses in transformers and other AC magnetic devices.
-
E.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
- 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: Lenz's law Target entity description: Lenz's law is a fundamental principle of electromagnetism stating that an induced current or electromotive force always acts in a direction that opposes the change in magnetic flux that produced it.
-
A.
Faraday's law of induction
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.
-
B.
Ampère–Maxwell law
The Ampère–Maxwell law is one of Maxwell’s equations that relates magnetic fields to electric currents and changing electric fields, thereby introducing the concept of displacement current and enabling the prediction of electromagnetic waves.
-
C.
Ampère's force law
Ampère's force law is a fundamental principle in electromagnetism that quantifies the mechanical force between electric currents in conductors.
-
D.
Steinmetz’s law of hysteresis
Steinmetz’s law of hysteresis is an empirical formula that relates the energy loss in magnetic materials to the maximum magnetic flux density, widely used in electrical engineering to estimate core losses in transformers and other AC magnetic devices.
-
E.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
law of electromagnetism
ⓘ
physical law ⓘ |
| appliesTo |
changing magnetic flux
ⓘ
induced current in a closed conducting loop ⓘ induced electromotive force in a circuit ⓘ |
| basedOn | conservation of energy ⓘ |
| category | classical electromagnetism ⓘ |
| componentOf |
Maxwell's equations
ⓘ
surface form:
Maxwell's equations framework
|
| countryOfFormulation | Russian Empire ⓘ |
| describes |
direction of induced current
ⓘ
direction of induced electromotive force ⓘ |
| ensures | conservation of energy in electromagnetic induction ⓘ |
| expresses | opposition to change in magnetic flux ⓘ |
| field | electromagnetism ⓘ |
| formulatedBy | Heinrich Lenz ⓘ |
| formulationYear | 1834 ⓘ |
| implies |
induced currents oppose motion that changes magnetic flux
ⓘ
magnetic fields created by induced currents oppose the original change in flux ⓘ |
| language | English name ⓘ |
| mathematicalForm | minus sign in Faraday's law of induction ⓘ |
| namedAfter | Heinrich Lenz ⓘ |
| originalLanguage | German ⓘ |
| originalName | Lenzsche Regel ⓘ |
| relatedConcept |
Faraday's law of induction
ⓘ
back electromotive force ⓘ conservation of energy ⓘ eddy currents ⓘ induced emf ⓘ magnetic flux ⓘ mutual induction ⓘ self-induction ⓘ |
| relatesTo |
Faraday's law of induction
ⓘ
electromagnetic induction ⓘ |
| states |
induced current flows in a direction that opposes the change in magnetic flux that produced it
ⓘ
induced emf acts in a direction that opposes the change in magnetic flux that produced it ⓘ |
| symbolicRepresentation |
E = - dΦ_B/dt
ⓘ
ε = - dΦ/dt ⓘ |
| taughtIn |
electrical engineering curricula
ⓘ
undergraduate physics courses ⓘ |
| usedIn |
design of electric generators
ⓘ
design of electric motors ⓘ eddy current braking ⓘ electromagnetic braking systems ⓘ induction heating ⓘ inductive sensors ⓘ magnetic damping ⓘ metal detectors ⓘ transformer operation ⓘ wireless power transfer analysis ⓘ |
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: Lenz's law Description of subject: Lenz's law is a fundamental principle of electromagnetism stating that an induced current or electromotive force always acts in a direction that opposes the change in magnetic flux that produced it.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.