What is the effect of a field?

Field Effect (Chemistry): an effect that a pole (unipolar or dipole) has on a remote reaction center (reaction rates, equilibrium). This effect works through space not through ties that distinguish it from the inductive effect.

Field Effect (Semiconductor): the physical mechanism that modulates the conductivity of a semiconductor using a applied voltage difference.

Field Effect (Medicine): Field effects within the medicine follow the physiology of textbooks and rigid rules. The immersed perimeter method adjusts the macroscopic scale of the interface between live blood and tissue. Individual fields of influence are numerous.

neoplasms (also known as “field defect”, “field cancerization” and “field carcinogenesis”), a field of molecular and cellular changes in normal apparent tissue that predispose to the development of cancer.

ischemia Variability of resources within the substrate by gradual or sudden degradation of the sources of blood or electricity. Encyclopedic Definitions of Gating, Pooling and Drainage Hydraulics extends the usefulness of understanding myocardium as the underlying substrate.

Wien effect, in electrolytes, increased ionic mobility or conductivity of electrolesses at a very high gradient of electrical potential.

In a metal the electronic density that responds to the applied fields is so large that an external electric field can only penetrate a very short distance in the material. However, in a semiconductor the lower density of electrons (and possibly holes) that can respond to an applied field is small enough to allow the field to penetrate far enough into the material. This field penetration alters the conductivity of the semiconductor near its surface and is called field effect. The field effect is the basis for the operation of the Schottky diode and field effect transistors, in particular the MOSFET, the JFET and the MESFET.

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