Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

electromagnetic energy
energy contained in electromagnetic fields and associated polarizable and magnetizable media.
energy
that which does work or is capable of doing work. In electrical systems, it is generally a reference to electrical energy measured in kilo-watt hours.
energy band
continuous interval of energy levels that are allowed in the periodic potential field of the crystalline lattice.
energy banking
pertaining to the maintenance of a thermal unit on hot reserve.
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.
energy conservation
the conservation of energy between the input and output of a system; i.e., the energy of the output signal is equal to that of the input signal to within a constant factor. A unitary or orthogonal transform conserves energy in that the energy or magnitude of the output vector is equal to that of the input vector.
energy gap
the width of the energy interval between the top of the valence band and the bottom of the conduction band.
energy level
one of the specific values possible for the energy of an electron in an atom or molecule.
energy product
the product of the magnetic flux density, Band magnetic field intensity, H at any operating point on the normal demagnetization curve, indicating the energy delivered by the magnet. The maximum energy product is commonly used to designate varying grades of materials.
energy relaxation
time the characteristic time for energy loss to scattering processes.
geothermal energy
thermal energy in the form of hot water and steam in the earth's crust.
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