United Kingdom
James Prescott Joule
said
My object has been, first to discover correct principles and then to suggest their practical development.
— On Electro-magnetic forces (March 10, 1840), in Annals of Electricity, Vol. 4, p. 484.
James Prescott Joule
English physicist and brewer (1818–1889)
- Fame77.5
- Momentum15.0
- United Kingdom rank#198
Source-basedStable
- Fame77.5
- Momentum15.0
- United Kingdom rank#198
- Scientists rank#40
- Wikipedia12K
Lived 1818–1889, aged 71United Kingdom
Summary
Updated 2026-06-08
An English physicist who proved heat and mechanical work are two faces of the same coin — a finding so fundamental that the basic unit of energy carries his name.
Biography
About
James Prescott Joule was born on 24 December 1818. He spent years studying the nature of heat, running experiments that revealed its relationship to mechanical work. Those findings, first published in 1843, became the scaffold for the law of conservation of energy and ultimately the first law of thermodynamics. He also observed magnetostriction and established the relationship between current through a resistor and the heat it throws off — now known as Joule's first law. Working alongside Lord Kelvin, he helped develop an absolute thermodynamic temperature scale that became the Kelvin scale. H…
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Fame
Stable77.5
Composite of search demand, mentions, audience & graph footprint.
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Momentum15.0
Historical24.4
Now attention4.6
Source confidence60.0
Completeness70.0
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- Pantheon 2.0High confidencedatabase · pantheon.world
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