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James Prescott Joule FRS FRSE (/ dʒ uː l /; [1] [2] [a] 24 December 1818 – 11 October 1889) was an English physicist, mathematician and brewer, born in Salford, Lancashire. Joule studied the nature of heat, and discovered its relationship to mechanical work .
Joule heating, in electricity, the conversion of electric energy into heat energy by the resistance in a circuit. The English physicist James Prescott Joule discovered in 1840 that the amount of heat per second that develops in a wire carrying a current is proportional to the electrical resistance.
- The Editors of Encyclopaedia Britannica
James Prescott Joule, English physicist who established that the various forms of energy, such as electrical and heat, are basically the same and can be changed one into another. Thus, he formed the basis of conservation of energy, the first law of thermodynamics.
- The Editors of Encyclopaedia Britannica
Apr 13, 2015 · James Joule played the major role in establishing the conservation of energy, or the first law of thermodynamics, as a universal, all-pervasive principle of physics. He was an experimentalist par excellence and his place in the development of thermodynamics is unarguable.
- John Young
- 2015
Joule recognized that, in a container that cannot exchange heat with the surroundings, if a gas is compressed, and then allowed to expand into a vacuum, the expanding gas does no work. Therefore, according to the First Law, the energy of an ideal gas would not change, nor would its temperature.
One of the pioneers in the field of modern thermodynamics was James P. Joule (1818 - 1889). Among the experiments Joule carried out, was an attempt to measure the effect on the temperature of a sample of water that was caused by doing work on the water.
James Prescott Joule (1818 – 1889), an English physicist, calculated in 1843, a few decades after Rumford’s cannon experiments, the mechanical equivalent of heat in a series of experiments. In the most famous apparatus he built for this end, now called the Joule apparatus (see image below), a descending weight attached to a string caused a ...
