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Encyclopedia > Gauss (unit)

The gauss, abbreviated as G, is the cgs unit of magnetic flux density (B), named after the German mathematician and physicist Carl Friedrich Gauss. One gauss is defined as one maxwell per square centimetre. This article or section is in need of attention from an expert on the subject. ... The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day. ... Current flowing through a wire produces a magnetic field (B, labeled M here) around the wire. ... (30 April 1777 â€“ 23 February 1855) was a German mathematician and scientist of profound genius who contributed significantly to many fields, including number theory, analysis, differential geometry, geodesy, magnetism, astronomy and optics. ... The maxwell, abbreviated as Mx, is the compound derived CGS unit of magnetic flux. ... A centimetre (American spelling centimeter, symbol cm) is a unit of length that is equal to one hundredth of a metre, the current SI base unit of length. ...

Although it was formerly stated that the term oersted replaced the term gauss, this is incorrect. The two units measure two different quantities, as explicated below. The oersted is old CGS unit of magnetic field strength (or magnetic induction). ...

According to the SI, also known as the MKS (meter-kilogram-second) system, the tesla is the unit of magnetic flux density, which physicists notate using the symbol B. There is no special unit for magnetic field intensity, which physicists notate H: instead, the compound unit ampere per meter is used. A cursory examination of Ampere's Law demonstrates the correctness of the unit: recall that the line integral of the inner product (or dot product) of magnetic field intensity and distance equals the number of ampere-turns of magnetomotive force, where "turns" do not contribute any dimensionality. Cover of brochure The International System of Units. ... Tesla can refer to: Scientist and inventor Nikola Tesla The tesla, an SI unit named after Nikola Tesla. ... In mathematics, an inner product space is a vector space with additional structure, an inner product (also called a scalar product), which allows us to introduce geometrical notions such as angles and lengths of vectors. ... In mathematics, the dot product, also known as the scalar product, is a binary operation which takes two vectors and returns a scalar quantity. ...

According to the alternative CGS (centimeter-gram-second) system, the [[gauss] is the unit of magnetic flux density (B), whilst the oersted is the unit of magnetic field intensity. The conversion factor between the two systems is 104: one tesla is ten thousand gauss, while one ampere per meter is ten thousand oersted. The oersted is old CGS unit of magnetic field strength (or magnetic induction). ...

The units for magnetic flux are the Weber (Wb) in the MKS system and the Maxwell (Mx) in the CGS system. The conversion factor is 108, since flux is the product of flux density and area, area having the units of the square of distance, thus 104 (flux density conversion factor) times the square of 102 (linear distance conversion factor, i.e., centimeters per meter).

(Note that the full names of the units—oersted, gauss, tesla—are not capitalized, though the corresponding symbols—Oe, G, T—are.)

Results from FactBites:

 Gauss - Wikipedia, the free encyclopedia (125 words) The gauss, abbreviated as G, is the cgs unit of magnetic flux density or magnetic induction (B), named after the German mathematician and physicist Carl Friedrich Gauss. For many years prior to 1932 the term gauss was used to designate that unit of magnetic field intensity which is now known as the oersted. The SI unit of magnetic flux density is the tesla.
 Unità Astronomica: Tutte le informazioni su Unità Astronomica su Encyclopedia.it (236 words) Unità Astronomica: Tutte le informazioni su Unità Astronomica su Encyclopedia.it Sebbene non rientri tra le unità di misura del Sistema Internazionale (SI), il suo uso è esteso tra gli astronomi ancora oggi. Espressa in unità SI risulta essere circa 10
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