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James Joule, British physicist

James Joule, British physicist


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James Joule, British physicist

James Joule (1818-1889), British physicist, measuring the heating in wires resulting from the passage of an electric current. Joule was interested in the physical properties of heat and, in 1840, determined that the heat generated in a wire by an electrical current was proportional to the resistance and the square of the current (Joules Law). In 1843 he determined the amount of mechanical work required to produce a given amount of heat. This work established the equivalence of heat and other forms of energy, and the principle of conservation of energy: energy is neither created nor destroyed. Taken from Physique Populaire, 1891

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Media ID 6411729

© SHEILA TERRY/SCIENCE PHOTO LIBRARY

1891 Conservation Of Energy Dead Electricity Experiment Experimenting Heat Measuring Physicist Scientist Thermodynamics Wire Wires Cells James Joule Physical


EDITORS COMMENTS
This print captures the brilliant mind of James Joule, a renowned British physicist who made groundbreaking discoveries in the field of thermodynamics. In this image, taken from Physique Populaire in 1891, we see Joule deeply engrossed in an experiment to measure the heating produced by an electric current passing through wires. Joule's pioneering work on heat and energy revolutionized our understanding of these fundamental concepts. In 1840, he established Joule's Law, which states that the heat generated in a wire is directly proportional to its resistance and the square of the current flowing through it. This discovery laid the foundation for many subsequent advancements in electrical engineering. Furthermore, three years later, Joule determined the amount of mechanical work required to produce a specific quantity of heat. This crucial finding not only demonstrated the equivalence between different forms of energy but also introduced us to one of nature's most profound principles: conservation of energy - that energy can neither be created nor destroyed. As we gaze upon this remarkable illustration depicting a moment frozen in time from over a century ago, we are reminded not only of James Joule's immense contributions but also his unwavering curiosity and dedication as a scientist. His legacy continues to inspire generations after him as they strive towards unraveling new mysteries within physics and beyond.

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