Electric inductive capacity

The dielectric constant of a polymer (K) (which we also refer to as relative electric permittivity or electric inductive capacity) is a measure of its interaction with an electrical field in which it is placed. It is inversely related to volume resistivity. The dielectric constant depends strongly on the polarizability of molecules tvithin the polymer. In polymers with negligible dipole moments, the dielectric constant is low and it is essentially independent of temperature and the frequency of an alternating electric field. Polymers with polar constituents have higher dielectric constants. When we place such polymers in an electrical field, their dipoles attempt... 

Dielectric constant (permittivity, electric inductive capacity)... 

Electrical conductivity, 319,335,337,339 Electrical properties, 319 Electric displacement, 348 Electric field, 351 Electric flux density, 348 Electric inductive capacity, 287, 319, 326 Electric permittivity, 287 Electric susceptibility, 348, 349 Electrochemical n-doping, 341 p-doping, 341 Electron acceptor, 333 parameter, 242 Electron donor, 333, 337 parameter, 242... 

The dielectric constant K), also known as the (relative) eleetric permittivity or the electric inductive capacity, is a measure of the electrical inertness... 

Dielectric Constant. Dielectric constant or specific inductive capacity (SIC) is both defined and measured by the ratio of the electric capacity of a condenser having that material as the dielectric to the capacity of the same condenser having air as the dielectric. The dielectric constant of vacuum is unity. Dry air has a constant slightly higher but for most practical purposes it is considered as unity. 

Some of the more important dielectric properties are dielectric loss, loss factor, dielectric constant (or specific inductive capacity), dc conductivity, ac conductivity, and electric breakdown strength. The term dielectric behavior usually refers to the variation of these properties within materials as a function of frequency, composition, voltage, pressure, and temperature. 

M = z f Ffi, where ja is the magnetic permeability of the medium (assumed to be equal to unity for air) F, the force at a point in magnetic field and r the distance between the poles. It follows that F = mm V jur2 ESU ate based on the strength of electrical charges (q and q ) q = Fk, where k is the specific inductive capacity ot dielectric constant (assumed as unity for air F, the force between two charges and r the distance. It follows that F =qqVkc2(See also " Electrostatic Law of Coulomb )... 

The dielectric constant (specific inductive capacity) is a measure of electrostatic polarizability and of the amount of electricity that can be stored in coal. The dielectric constant is more useful than electrical conductivity in characterizing coal and is a measure of the electrostatic polarizability of the dielectric coal. The dielectric constant of coal is believed to be related to the polarizability of the tt-elecirons in the clusters of aromatic rings in the coal chemical structure. 

The impedance can be calculated for several types of electrical basic devices. For example, for an Ohm-type resistor, the impedance is Z =, for an ideal capacitor, the impedance is Z = —if 27tvC), and for an ideal inductor, the impedance is Z = —ilirvL. C is the electric capacity, and L is the electric induction. 

Permittivity is a measure of the degree to which an insulating medium can induce an electric charge between conducting planes. It is measured in Farads per meter. The absolute permittivity of free space (Cq) has a value of 8.85 X 10 2 Farad per metre. The relative permittivity (e) of a substance is the ratio of its absolute permittivity to Cq e value of varies from unity (for a vacuum) to over 4000 (for ferroelectrics). The quantity is also called the dielectric constant of specific inductive capacity of the material. 

The equation of compatibility of these 2n eejuations in the 2a unknowns. 4 and At is the secular equation (1). Furthermore (12) and (13) together can be used to obtain the coefficients A, and At, once a suitable value of a is inserted. There are still other forms of the secular equation, some of which may be useful for special purposes. For example, for solution by the inductance-capacity electric network (Sec. 9-10), it is necessary (for practical reasons) to have the secular equation in a form which is S5 mmetrical and has the unknown occurring only on the principal diagonal and with unit coefficient. Phis is the form which Eq. (5), Sec. 4-3, ivould take if the internal coordinates used were mutually orthogonal and properly normalized, beciause then Gu- = 8,. Details of the orthogonalization procedure are given in Sec. 9-2. 

However, this does not represent his only quantitative work. See M. Faraday, "Experimental Researches in Electricity -Eleventh Series. On Induction", Phil.Trans.. 1838, 128 1-40, section v for his work on specific inductive capacity. 

Energy of the Electric Field n If H is the electric field intensity in electrostatic units and the specific inductive capacity, the energy of the field in ergs per centimeter cube is... 

Y. U. Diikova. Y. Z. l akhovakii, and B. L SazUn. Influence of the constant electrical field on the elfective inductive capacity of multilayer dielectrics on the box of polyfvinylideoc fluoride) and polyfethylcoe terephthalaie), VysakamoL Soed A34 116 (1992), in Rusuan. 

Before we consider the behaviour of polymers, it is helpful to define the basic quantities which occur in dielectric and electrical studies. The relative dielectric permittivity, which is also known as the dielectric constant, or specific inductive capacity, of a material occurs naturally in Maxwell s equations for the propagation of electromagnetic radiation through a medium. However it is perhaps simpler to define it in relation to low frequency ( lumped circuit ) measurements as the factor of proportionality between the dielectric displacement D and the applied electric field E when the field is applied to a capacitor filled with the dielectric. 

Dielect Const Dielectric Constant, or relative permittivity, (sometimes specific inductive capacity or permittivity) is a measure of how well a material will store electrical charge. An insulating material needs a low dielectric constant. It is the (unitless) ratio of the capacity of a condenser made with a plastic over the capacity of an identical condenser made with air as the dielectric. 

The power factor cos 6 is always a positive fraction between 0 and 1 (as long as 161 < 90°). The smaller the power factor, the greater the current that must be supplied to the circuit for a given active (useful) power output requirement. The increase in current associated with low power factors causes greater line losses or requires an increase in the capacity of the transmission equipment (wire size, transformers, etc.). As a result, for industrial applications there is often a power factor charge in the rate structure for supplying electricity. The usual situation is for loads to be inductive, and the industrial consumer may add capacitance to their circuits to correct the lagging power factor. 

The simplest electrical elements that can be part of an electrical equivalent circuit are resistance R, capacity C and induction L, with the following impedance functions ... 

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