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André Marie Ampère

(1775–1836) French physicist who from 1809 taught at the Ecole Polytechnique in Paris. He is best known for putting electromagnetism (which he called ‘electrodynamics’) on a ...

Ampère, André Marie

Ampère, André Marie (1775–1836)   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
47 words

...Ampère, André Marie ( 1775–1836 ) French physicist who from 1809 taught at the Ecole Polytechnique in Paris. He is best known for putting electromagnetism (which he called ‘electrodynamics’) on a mathematical basis. In 1825 he formulated Ampère’s law . The ampere is named after...

Ampère, André Marie

Ampère, André Marie (1775–1836)   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
74 words

..., André Marie ( 1775–1836 ) French physicist and mathematician . He founded electrodynamics (now called electromagnetism ) and performed numerous experiments to investigate the magnetic effects of electric currents . He devised techniques for detecting and measuring currents, and constructed an early type of galvanometer. Ampère's law (proposed by him) is a mathematical description of the magnetic force between two electric currents. His name is also commemorated in the fundamental unit of current, the ampere ...

Ampère, André‐Marie

Ampère, André‐Marie (1775–1836)   Reference library

The New Oxford Companion to Literature in French

Reference type:
Subject Reference
Current Version:
2005
Subject:
Literature
Length:
72 words

..., AndréMarie ( 1775–1836 ). French physicist , founder of the science now known as electromagnetism. Ampère, a child prodigy in mathematics and later an inspired experimentalist, was the first to demonstrate, and to express mathematically, the relationship between electricity and magnetism. He initiated a standard system of measurement for electric currents. His works include an Essai sur la philosophie des sciences ( 1834–44 ) and the posthumously published Journal et correspondance . [ Malcolm Bowie...

Ampère, André Marie

Ampère, André Marie   Quick reference

A Dictionary of Scientists

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology
Length:
581 words

..., André Marie (1775–1836) French physicist and mathematician Ampère was born in Lyons, France, where his father was a wealthy merchant. He was privately tutored, and to a large extent self-taught. His genius was evident at an early age. He was particularly proficient at mathematics and, following his marriage in 1799 he was able to make a modest living as a mathematics teacher in Lyons. In 1802 he moved first to Bourg-en-Bresse to take up an appointment, then to Paris as professor of physics and chemistry at the Ecole Centrale. His first publication...

André-Marie Ampère

André-Marie Ampère (1775–1836)   Reference library

Francis Crick

Oxford Dictionary of Scientific Quotations

Reference type:
Quotation
Current Version:
2006
Subject:
Quotations
Length:
183 words

...André-Marie Ampère 1775 – 1836 French mathematician, chemist and physicist on Ampére Ampere was a mathematician of various resources & I think might rather be called excentric [sic] than original. He was as it were always mounted upon a hobby horse of a monstrous character pushing the most remote & distant analogies. This hobby horse was sometimes like that of a child ['s] made of heavy wood, at other times it resembled those [?] shapes [?] used in the theatre [?] & at other times it was like a hypogrif in a pantomime de imagie. He had a sort of faith...

Ampère, André Marie

Ampère, André Marie (1775–1836)   Reference library

The New Oxford Dictionary for Scientific Writers and Editors (2 ed.)

Reference type:
Subject Reference
Current Version:
2009

..., André Marie ( 1775–1836 ) French physicist and mathematician . * ampere (no accent) Ampère balance Ampère–Laplace law (en dash) Ampère's law Ampère's rule Ampère's...

Ampère, André-Marie

Ampère, André-Marie   Quick reference

Oxford Dictionary of English (3 ed.)

Reference type:
English Dictionary
Current Version:
2015
Subject:
English Dictionaries and Thesauri
Length:
47 words
Ampère, André-Marie

Ampère, André-Marie   Quick reference

New Oxford American Dictionary (3 ed.)

Reference type:
English Dictionary
Current Version:
2015
Subject:
English Dictionaries and Thesauri
Length:
45 words
Ampère, André-Marie

Ampère, André-Marie   Reference library

The New Zealand Oxford Dictionary

Reference type:
English Dictionary
Current Version:
2005
Subject:
English Dictionaries and Thesauri
Length:
51 words
André Marie Ampère

André Marie Ampère  

Reference type:
Overview Page
(1775–1836) French physicistwho from 1809 taught at the Ecole Polytechnique in Paris. He is best known for putting electromagnetism (which he called ‘electrodynamics’) on a mathematical basis. In ...
ampere

ampere  

Symbol A. The SI unit of electric current. The constant current that, maintained in two straight parallel infinite conductors of negligible cross section placed one metre apart in a vacuum, would ...
Michael Faraday

Michael Faraday  

Reference type:
Overview Page
(1791–1867)British chemist and physicist, who received little formal education. He started to experiment on electricity and in 1812 attended lectures by Sir Humphry Davy at the Royal Institution; a ...
ampere

ampere   Quick reference

A Dictionary of Chemical Engineering

Reference type:
Subject Reference
Current Version:
2014

...ampere (Symbol A) The SI unit of electric current equal to one coulomb per second. Since May 2019, it is based on the definition of elementary electrical charge as a fixed numerical value of 1.602 176 634 x10 -19 coulombs. It is named after the French physicist and mathematician André-Marie Ampère ( 1775–1836 ), who made significant discoveries in electricity and magnetism. http://www.npl.co.uk/si-units/ampere/ National Physical Laboratory website. ...

ampere

ampere   Quick reference

A Dictionary of Chemistry (7 ed.)

Reference type:
Subject Reference
Current Version:
2016
Subject:
Science and technology, Chemistry
Length:
89 words

... Symbol A. The SI unit of electric current. The constant current that, maintained in two straight parallel infinite conductors of negligible cross section placed one metre apart in a vacuum, would produce a force between the conductors of 2 × 10 −7 N m −1 . This definition replaced the earlier international ampere defined as the current required to deposit 0.001 118 00 gram of silver from a solution of silver nitrate in one second. The unit is named after the French physicist André Marie Ampère ( 1775–1836...

classification of the sciences

classification of the sciences   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,009 words

...(affinity and substance). In France, André-Marie Ampère constructed a dichotomous classification of the sciences into 128 divisions in his Essai sur la philosophie des sciences ( 1834 ). Thus he divided general physics into elementary general physics and mathematical physics and these in turn into experimental physics, chemistry, stereonomy, and atomology. The latter pair of names illustrates the many neologisms Ampère introduced, which probably did little to encourage others to accept his classification. Neither Ampère's scheme nor Whewell's found favor....

field

field   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
513 words

...such as atoms and the ether. As he wrote in 1846 , he sought “to dismiss the aether, but not the vibrations.” Initially Faraday's contemporaries ignored his field concept, since it did not have the mathematical precision of action-at-a-distance theories such as André-Marie Ampère 's electrodynamics . William Thomson (Lord Kelvin) reacted with contempt to Faraday's “way of speaking of the phenomena.” However, Faraday's field theory had the great merit that in treating electrical events it took account not only of the wire carrying the electric...

electromagnetism

electromagnetism   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,141 words

...Oersted thought his experiment gave evidence of such a unifying force and proposed a connection between electricity and magnetism. André-Marie Ampère soon mathematized Oersted's experiment, providing a force law for currents in wires. In 1831 Michael Faraday , who may also have dabbled in Naturphilosophie, explored the reverse effect, the ability of a moving magnet to generate electric currents. Oersted, Ampère, and Faraday thus established electromagnetism, although all three noted a difference between the linear action of electricity and the...

electricity

electricity   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,457 words

...industrial applications of electrochemical processes. In 1820 , Hans Christian Oersted discovered that a wire carrying an electric current deflects a magnetic needle. André-Marie Ampère quickly showed that a current-carrying loop or solenoid was equivalent to a magnet, and proposed that all magnetism arose from solenoidal electric currents in molecules of iron ( See Magnetism ). Ampère's discovery led to the construction of electromagnets—iron-cored solenoids carrying ever-larger currents—that produced magnetic effects far more powerful than any...

magnetism

magnetism   Reference library

The Oxford Companion to the History of Modern Science

Reference type:
Subject Reference
Subject:
Science and technology, History of Science
Length:
1,054 words

...fully mathematized version of Coulomb's theory. From Gilbert on, magnetism and electricity had been regarded as unconnected (if analogous) phenomena. However, in 1820 , Hans Christian Ørsted discovered that a wire carrying an electric current affected a compass needle. André-Marie Ampère quickly showed that a current-carrying loop or solenoid was equivalent to a magnet. He argued from this that the magnetic fluids were a fiction and that magnetization derived from tiny solenoidal electric currents in molecules of iron. In the manner of Laplace, he showed...

Telegraph

Telegraph   Reference library

David Hochfelder

The Oxford Encyclopedia of the History of American Science, Medicine, and Technology

Reference type:
Subject Reference
Current Version:
2015

...The telegraph was the outgrowth and application of advances in electrical science between about 1800 and 1840 , particularly the invention of the electrical battery by Alessandro Volta around 1800 and research into electromagnetism by Hans Christian Oersted, Andre Marie Ampere, Joseph Henry, and Michael Faraday during the 1820s and 1830s. Telegraphy was the first technology to sever the connection between communication and transportation. Because of the telegraph’s ability to transmit information almost instantly, it affected many aspects of...

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