# Electrostatic Field

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Related to Electrostatic Field: Magnetostatic field

## electrostatic field

(electricity)
A time-independent electric field, such as that produced by stationary charges.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

## Electrostatic Field

an electric field that consists of stationary electric charges interacting with each other. Like a variable electric field, an electrostatic field may be characterized by electric field strength E, which is the ratio of the force acting on a charge to the magnitude of the charge. The lines of force, which determine the field strength, are not closed: they extend from positive charges to negative charges. In dielectrics, the electrostatic field is characterized by the vector D, known as electric flux density (seeINDUCTION, ELECTRICAL AND MAGNETIC), which satisfies Gauss’ theorem.

An electrostatic field is a potential field; that is, the work of the field in moving an electric charge between two points does not depend on the shape of the trajectory. Over a closed path, the work is equal to zero. Owing to its potential character, an electrostatic field can be represented by a single scalar function—the electrostatic potential φ, which is related to the vector E by the equation E = – grad φ. The potential φ satisfies Poisson’s equation.

In a homogeneous dielectric, the electrostatic field is decreased by a factor oft, where e is the permittivity. The electrostatic field inside a conductor is equal to zero, whereas all points on the conductor’s surface have the same potential φ. If there is a cavity in the conductor, the electrostatic field in the cavity is also equal to zero. Electrostatic shielding is based on the latter phenomenon.

### REFERENCES

See references under .
References in periodicals archive ?
(2), it can be seen that for a given applied voltage and field reduction factor, a smaller tip apex radius will yield a higher electrostatic field. From the Folver Nordheim equations  we also know that a higher electrostatic field will produce a higher current density of field emission (A/[mm.sup.2]):
Then from (6) at [[phi].sub.0]=0.25 V and [[DELTA].sub.e] [approximately equal to] 0.22 x [10.sup.-10] m, which follows from the approximate calculation by (1) with the accepted initial data ([T.sub.0]=273.15 K; [n.sub.0] [approximately equal to] 2.68 x [10.sup.25] [m.sup.-3] ), it follows that in the zone of the DEL under consideration the intensity [E.sub.e] of the electrostatic field will reach a huge numerical value of about 1.13 x [10.sup.10] V/m.
Soltanizadeh, "Effect of high voltage electrostatic field thawing on the lipid oxidation of frozen tuna fish (Thunnus albacares)," Innovative Food Science and Emerging Technologies, vol.
If we randomly place the 2N infinite charged planes parallel to each other along the zaxis at position [z.sub.n] = nd where n [member of] {0,1, ..., 2N - 1}, then the electrostatic field would evolve along the z-axis making random jumps each time it crosses an infinite charged sheet.
Furthermore, surface tension decreases with increasing temperature (it applies that d[gamma]/dT <0), resulting in a lower critical value of the electrostatic field [E.sub.C] at which the spinning process initiates.
Electrostatic field in the system "corona wire between two parallel plane electrodes with different potentials" is studied in .
In this study, to separate glycerin from glycerin-biodiesel mixture, an electrostatic field caused by a high voltage (more than kV) and low amperage AC current (mA) is used.
The resulting electrostatic field produces an electrostatic force to drive the motion of the moveable set of combs.
In , the process of data forwarding in WSNs is analyzed as electric charge moving in electrostatic field. The corresponding positive and negative charges are assigned to sink and the data of sensors depending on the amount of residual energy of sink's neighbors and sensors.
Trek's new Electrostatic Discharge Audit Kit-Model 511/1501--includes an Ionizer Kit (Model 511 electrostatic field meter with charger and charge plate) and Model 1501 surface resistance meter, all in a compact carrying case.
On the Disney Research website, it said that when touching another person's ear, this modulated electrostatic field creates a very small vibration of the earlobe and as a result, both the finger and the ear together form a speaker that makes the signal audible for the person touched.

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