The weber may be defined in terms of Faraday's law, which relates a changing magnetic flux through a loop to the electric field around the loop. A change in flux of one weber per second will induce an electromotive force of one volt.
Weber (unit of magnetic flux) — The weber is the magnetic flux which, linking a circuit of one turn, would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second.
In SI base units, the dimensions of the weber are . In derived units, they are volt-seconds , or joules per amp .
It was not until 1927 that TC1 dealt with the study of various outstanding problems concerning electrical and magnetic quantities and units. Discussions of a theoretical nature were opened at which eminent electrical engineers and physicists considered whether magnetic field strength and magnetic flux density were in fact quantities of the same nature. As disagreement continued, the IEC decided on an effort to remedy the situation. It instructed a task force to study the question in readiness for the next meeting.
In 1930, TC1 decided that the magnetic field strength (H) is of a different nature than the magnetic flux density (B), and took up the question of naming the units for these fields and related quantities, among them the integral of magnetic flux density.
It was decided to extend the existing series of practical units into a complete comprehensive system of physical units, the recommendation being adopted in 1935 “that the system with four fundamental units proposed by Professor Giorgi be adopted subject to the fourth fundamental unit being eventually selected.” This system was given the designation of “Giorgi system.”
Also in 1935, TC1 passed responsibility for “electric and magnetic magnitudes and units″ to the new TC24. This “led eventually to the universal adoption of the Giorgi system, which unified electromagnetic units with the MKS dimensional system of units, the whole now known simply as the SI system (Système International d’unités).″
In 1938, TC24 “recommended as a connecting link [from mechanical to electrical units] the permeability of free space with the value of … µ0 = 4π · 10–7 H/m.” It also “recognized that any one of the practical units already in use — ohm, ampere, volt, henry, farad, coulomb and weber — could equally serve as the fourth fundamental unit.”
“After consultation … the ampere was adopted as the fourth unit of the Giorgi system in Paris in 1950.”
CABINET COMMITTEE ON ECONOMIC AFFAIRS APPROVES INCREASE IN REVISION OF UNIT COST OF SCHOOL TOILET UNIT BEING CONSTRUCTED UNDER TOTAL SANITATION CAMPAIGN
Jun 24, 2010; NEW DELHI, June 24 -- The government of India issued the following news release: The Cabinet Committee on Economic Affairs today...
WIPO ASSIGNS PATENT TO QURE FOR "ELECTRONIC LOCKING SYSTEM WITH NON-CONTACT OPERATION BY MEANS OF A CONTROL UNIT BEING ARRANGED FOR DETECTING RADIO SIGNALS TRANSMITTED FROM A MOBILE UNIT" (SWEDISH INVENTORS)
Sep 22, 2011; GENEVA, Sept. 22 -- Publication No. WO/2011/112139 was published on Sept. 15. Title of the invention: "ELECTRONIC LOCKING SYSTEM...
Plan to convert to flats agreed ; A st MARY'S guest house with nine letting bedrooms has won permission to convert into six flats, five of which would be self- catering with the remaining unit being for the owner's use.
Jul 15, 2010; A st MARY'S guest house with nine letting bedrooms has won permission to convert into six flats, five of which would be self-...