Electromagnetic unit

Electromagnetic unit emu Flow rate, column chroma- Fo... 

The electromagnetic unit, however, as used in a residual VT (Section 15.4.3) or a capacitor VT (Section 15.4.4) should be suitable for carrying the heavy discharge or inrush currents during a capacitor discharge or switching respectively. 

Additional tests on a capacitor VT The tests discussed above refer generally to the electromagnetic unit only. To test the whole VT, the following tests are recommended. For the test procedure and results refer to lEC 60186. 

Amp/Sec = 1/96489 Faraday, where EMU is abbr for "electromagnetic unit and ESU for " electrostatic unit ... 

We shall use mainly the cgs Gaussian system of units. This is a mixed system with electrical quantities measured in cgs electrostatic units (esu) and magnetic quantities measured in cgs electromagnetic units (emu). 

Many of the difficulties in converting units between different systems are associated either with the electromagnetic units, or with atomic units and their relationship to the electromagnetic units. In sections 7.3 and 7.4 the relations involving electromagnetic and atomic units are developed in greater detail to provide a background for the conversion factors presented in the table in section 7.2. 

Do not worry about making the units come out, or about doing the calculation in MKS units electromagnetic units can be very complicated and are beyond the scope of this book.) ... 

The algebraic signs of q and q determine whether the force is attractive or repulsive. If q and q2 are like charges, they repel F > 0), whereas opposite charges attract F < 0). In our applications to atomic and molecular structure, it is clumsy and unnecessary to carry the constant 47T6o. We will instead write Coulomb s law in gaussian electromagnetic units, whereby... 

One should avoid using non-SI units from the following unit systems the esu (electrostatic unit system), the emu (electromagnetic unit system) and the Gaussian unit system. However, equations relating these still widely used unit systems to the SI are listed in Chapter 7 of [1] which also makes extensive use of quantity calculus to help converting between those systems of units. 

The amount, or quantity, of electricity passing through a circuit is measured in coulombs, which are, in turn, the product of the amperes and time in seconds.2 At an international electrical conference in London (1908) the ampere was adopted as one of the fundamental units. The ampere is defined as the steady current which, when passed through a solution of silver nitrate in water, under definite conditions to be described later, deposits silver at the rate of 0.00111800 gram per second. This value of the ampere is one-tenth of the c.g.s. (electromagnetic) unit within a few parts in one hundred thousand. The instrument used for measuring current in terms of deposited silver is called a silver coulometer or a silver voltameter.8... 

Orange-colored, crystalline solid. Sublimes at 431. mp 499 (elevated pressure). Fumes heavily in air. Dissolves in water with the liberation of steam. Heat of formation 90 kcal/mo at 25°. Magnetic susceptibility —0,238 X 10-6 c.g.s. electromagnetic units. 

Anhydrous zirconium (IV) iodide is an orange crystalline solid which fumes heavily in air. It dissolves completely in water with the liberation of energy. According to Blumen-thal, it has a heat of formation of 90 kcal./mol at 25°. It sublimes at 431° at atmospheric pressure and melts at 499° at elevated pressures. Its heat and entropy of sublimation are 29.0 and 41.2 kcal./mol, respectively. Its magnetic susceptibility is —0.238 X 10 c.g.s. electromagnetic units. 

Gaussian units A system of units for electric and magnetic quantities based upon c.g.s. electrostatic and electromagnetic units. Although replaced by S1 units in most branches of science, they are, like Heavi-side-Lorentz units, still used in relativity theory and in particle physics. In Gaussian units, the electric and magnetic constants are both equal to unity. 

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