![]() The relations among these standards should be simplified by defining them as follows:. In the opinion of the Committee it was considered highly desirable, from a scientific point of view, that units is called a Volt and the current produced by a Volt acting through an Ohm, that is to say, a current of 10⁸ ÷ 10⁹ or 0.1 C. units is called an Ohm an electromotive force of 10⁸ C. The present usage with respect to this matter is that a resistance of 10⁹ C. It is reproduced from Alexander MacFarlane, Lectures on Ten British Physicists of the Nineteenth Century.Ī further question arising out of the mutual relations of the fundamental units was that of the magnitude of the practical units to which distinctive names should be attached. This is merely the last verse of the poem. ![]() “Valentine from a male telegraphist to a female telegraphist.” In the 19ᵗʰ century, a unit of electric current, and sometimes a unit of quantity of electricity. Reports of the Committee on Electrical Standards Appointed by the British Association for the Advancement of Science. Hence the webers “cut” by a closed wire circuit of n turns areĮqual to the quantity of electricity in coulombs thereby impelled round thatĬircuit multiplied by 1/n th its resistance in ohms. Note.-A weber added per second at a steady rate to the field girdled by a wire circuit induces one volt in every turn of that circuit. That, as a unit for magnetic field, a hundred million “C.G.S. Taking into account the fact that the question of magnetic units is still under discussion by various bodies, the Committee wish to come to no hasty decisions, but they recommend for tentative adoption the following terminology:-ġ. The weber was introduced as a practical electromagnetic unit = 10⁸ maxwells at the International Electrotechnical Commission in Paris in 1933, but it was not much used until the meter-kilogram-second system was generally adopted. ![]() In 1948.) The weber is volt seconds or, in terms of base units only, Would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate inġ second.” (Resolution 2, CIPM, 1946, ratified by the CGPM One weber is “the magnetic flux which, linking a circuit of one turn, For the meaning of any metric prefix, go here.
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