what is dielectric polarigation?

Answer 1

DIELECTRIC BEHAVIOR

Dielectric behavior occurs in all insulators - solids, liquids and gases, yet it is not yet fully under - stood, and certain generalizations apply, especially when considering aggregates, such as the poly - crystalline ceramics.

DIELECTRIC POLARIZATION

Dielectric polarization arises due to the existence of atomic and molecular forces, and appears when - ever charges in a material are somewhat displaced with respect to one another under the influence of an electric field.In a capacitor, the negative charges within the dielectric are displaced toward the positive electrode, while the positive charges shift in the opposite direction. As charges are not free to move in an insulator, restoring forces are activated which either do work, or cause work to be done on the
system, i.e. energy is transferred. On charging a capacitor, the polarization effect opposing the applied field draws charges onto the electrodes, storing energy. On discharge, this energy is re-leased.A result of the above interaction is that certain materials, which possess easily polarizable charges, will greatly influence the degree of charge which can be stored in a capacitor. The proportional increase in storage ability of a dielectric with respect to a vacuum is defined as the dielectric constant of the material.The degree of polarization P is related to the dielectric constant K, and the electric field strength E as follows:P = eo(K-1) Ewhere eo is the permittivity of free space, (a constant). The total polarization of a dielectric arises from four sources of charge displacement: (a) electronic dis - placement, (b) ionic displacement, (c) orientation of permanent dipoles and (d) space charge displace - ment. The total contribution of polarization to the dielectric constant is therefore a summation of the above:Pt = Pe+Pi+Pd+PsElectronic Displacement:This effect is common to all materials, as it involves distortion of thecenter of charge symmetry of the basic atom.

Under the influence of an applied field, the nucleus of an atom and the negative charge center of the electrons shift, creating a small dipole.This polarization effect is small, despite the vast number of atoms within the material, because the moment arm of the dipoles is very short, perhaps only a small fraction of an Angstrom ( lÅ= 10-10meters).

Answer 2

Dielectric polarization is the term given to describe the behavior of a material when an external electric field is applied on it. A simple picture can be made using a capacitor as an example. The figure below shows an example of a dielectric material in between two conducting parallel plates.

https://www.electrikals.com/

Answer 3

Do you mean 'dielectric polarisation'?

When a polarised electromagnetic wave passes through a dielectric medium the charges in the medium experience a force from the moving electric field. They move in a particular direction and hence the medium is polarised. This property can be useful for nonlinear optical effect.

Answer 4

The theory of dielectric polarization


One main goal of studies of dielectric polarization is to relate macroscopic properties such as the dielectric constant to microscopic properties such as the polarizability.

Answer 5

dielectric polarization is simple process. it is just we will place the material in between charged plates.then the +ve and -ve charges which are in the material will be separated by some distance.there by dipoles are formed.this process is called polarization.