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Commonly used terms in the Electrical industry.
electric vector potential
a vector function that is used to derive solutions for electric and magnetic fields.
electrolytic capacitor
a capacitor solution between two electrodes or plates of a capacitor, at least one of which is covered by a dielectric.
electromagnetic compatibility (EMC)
the ability of a system or equipment to operate within design tolerances in its intended environment, with adjacent systems and equipment, and with itself, so that the effect of any electromagnetic disturbances produced by the systems or equipment is reduced.
electromagnetic pulse (EMP)
a large impulsive-type electromagnetic wave generated by nuclear or chemical explosions.
electromagnetic spectrum
the frequency and wavelength of electromagnetic radiation. We have the following classification reported in the figure, while the microwave frequency band designations is reported in the table.
electromagnetic susceptibility
a device's failure to perform appropriately if there is an electromagnetic disturbance.
electromagnetic wave propagation
the phenomenon of electromagnetic energy propagating in the form of waves of the coupled
electric and magnetic field intensity vectors.
electromagnetically induced transparency
a technique to render optically dense media transparent by using a long-lived quantum Electromagnetic spectrum.
electron impact excitation
excitation of an atom or molecule resulting from collision by an electron.
electron multiplication
the phenomenon where a high-energy electron strikes a surface and causes additional electrons to be emitted from the surface. Energy from the incident electron transfers to the other electrons to cause this. The result is electron gain proportional to the incident electron energy.
electron plasma
a plasma medium in which electrons are the mobile charge carriers and the ions form the stationary compensating positive charge background.
electron-beam lithography
refers to a lithographic (or photographic) process in which the exposure energy is provided by the energy carried by a beam of focused electrons rather than by photons (light).
electronic nonlinear response
the nonlinear optical response resulting from the motion of bound electrons. It is characterized by moderately large response and very short (several fs) response times.
electroplastic effect
plastic deformation of metals with the application of high-density electric current.
electroplastic smart material
material with smart properties of elastic deformation changes proportional to a controlled electric current applied in proportion to the sensed deformation.
electrostatic precipitator
a method of extracting dust from stack gases or ventilating systems in which ions are laid on the dust particles by high-voltage electrodes and then attracted electrostatically into a trap.
elliptical polarization
the polarization state of a radiated electromagnetic field in which the tip of the electric field vector traces an ellipse as a function of time for a fixed position. The sense of rotation of the electric field vector is either right-hand or left-hand (clockwise or counter-clockwise). Circular polarization and linear polarization are special cases of elliptical polarization.
EMP
See
electromagnetic pulse
EMTP
the Electro-Magnetic Transient Program, a computer program which simulates an electric power system such that its response to disturbances may be accurately predicted.
energy compaction
in a transformation, the concentration of the input signal energy into a relatively small part of the transformed signal. A linear transform of a random vector compacts the signal energy when the energy or variance of a small number of transform coefficients is large relative to the variance of the other coefficients.