Field Intensity, Electric

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Field Intensity, Electric


a physical vector quantity (E) that is a fundamental quantitative characteristic of an electric field. It is defined as the ratio of the force that the field exerts on an electric charge to the magnitude of the charge, assuming that the charge is sufficiently small so as not to change either the magnitude or the location of the charges that generate the field being studied. The electric field intensity of free space satisfies the superposition principle. According to this principle, the total field intensity at a given point is equal to the geometric sum of field intensities generated by the individual charged particles. For an electrostatic field, the electric field intensity can be represented as the gradient of an electric potential φ:E = —grad φ. In the International System of Units (SI), electric field intensity is measured in units of volts per meter.


Tamm, I. E. Osnovy teorii elektrichestva, 7th ed. Moscow, 1957.
Kalashnikov, S. G. Elektrichestvo. Moscow, 1956. (Obshchii kurs fiziki, vol. 2.)
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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and the magnetic field intensity, electric flux density and electric field by the following equation

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