# Electrostatic Field

Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Electrostatic Field: Magnetostatic field

## electrostatic field

(electricity)
A time-independent electric field, such as that produced by stationary charges.

## 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 ?
nominally heatproof to 80 [degrees]C) and the resulting changes to dielectric properties of the material which likely affected electrostatic field inside the unit.
F] > 10 1/min we observed fiber formation even without the electrostatic field acting (i.
Analysis of electrostatic field in three electrode system without the space charge shown in Fig.
Results of using various electrodes (point to point, plate, rod and wire), various distances between electrodes (3, 6 and 9cm) in various voltage and currents proved that point to point electrode with distance of 3 cm and higher electrostatic field intensity has most effective reducing the glycerin separation time.
For example, if the insulators in the environment are not producing electrostatic fields, why purchase ionizers to solve a problem that doesn't exist?
The company's most recent acquisitions, namely the 4 column hydraulic press - 200 tf, the hydraulic guillotine, the installation for painting in electrostatic field, and the cutter plotter are also included in the website together with the works portfolio and the certifications obtained.
A dielectric is a nonconducting substance which can support an electrostatic field without dissipating much heat.
Under the influence of a high electrostatic field, electrons can be emitted from a tungsten tips surface into electrolyte.
This is because the electrostatic field strength achieves the maximum value near the corona electrode and decreases with an increase of the distance from it.
As each electron passes, its electrostatic field moves charges inside the plate.
The residues identified as critical for binding with actin are located in the positive groove of the electrostatic field of LDH (Figure 1).

Site: Follow: Share:
Open / Close