Joule’s law of heating
E868104
Joule’s law of heating is a fundamental principle in electricity stating that the heat produced in a conductor is proportional to the square of the current, the resistance, and the time the current flows.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Joule's law | 1 |
| Joule’s law | 1 |
| Joule’s law of heating canonical | 1 |
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
law of electricity
ⓘ
physical law ⓘ |
| alsoKnownAs |
Joule heating law
NERFINISHED
ⓘ
Joule’s first law NERFINISHED ⓘ |
| appliesTo |
electrical conductors
ⓘ
resistive elements ⓘ |
| assumes |
constant resistance during the time interval
ⓘ
ohmic conductor ⓘ |
| category | classical physics ⓘ |
| describes | conversion of electrical energy into heat ⓘ |
| discoveredBy | James Prescott Joule NERFINISHED ⓘ |
| explains |
I^2R losses in power transmission lines
ⓘ
temperature rise in resistors ⓘ |
| field |
electrical engineering
ⓘ
electromagnetism ⓘ thermodynamics ⓘ |
| hasAlternativePowerForm |
P = V I
ⓘ
P = V^2 / R ⓘ |
| hasFormula | Q = I^2 R t ⓘ |
| hasPowerForm | P = I^2 R ⓘ |
| historicalPeriod | 19th century ⓘ |
| implies | power dissipated in a resistor is proportional to the square of the current ⓘ |
| isConsequenceOf | conservation of energy ⓘ |
| isRelatedTo |
Fourier’s law of heat conduction
NERFINISHED
ⓘ
Ohm’s law NERFINISHED ⓘ |
| isUsedIn |
design of electric heaters
ⓘ
design of fuses ⓘ electric kettles ⓘ electric stoves ⓘ incandescent lamps ⓘ safety analysis of electrical circuits ⓘ thermal management of electronic devices ⓘ |
| mathematicalForm | Q ∝ I^2 R t ⓘ |
| namedAfter | James Prescott Joule NERFINISHED ⓘ |
| proportionalTo |
resistance
ⓘ
square of current ⓘ time of current flow ⓘ |
| relatesQuantity |
electric current
ⓘ
electrical resistance ⓘ heat generated ⓘ time ⓘ |
| states | heat produced in a conductor is proportional to the square of the current, the resistance, and the time of flow ⓘ |
| unitOfHeatEnergy | joule NERFINISHED ⓘ |
| usesSymbol |
I for current
ⓘ
Q for heat energy ⓘ R for resistance ⓘ t for time ⓘ |
| validWhen |
current distribution is uniform in the conductor
ⓘ
frequency effects like skin effect are negligible ⓘ |
| yearProposed | 1840s ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Joule’s law
this entity surface form:
Joule's law