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Why does coulomb force between two point charges depends upon dielectric constant of the intervening medium?
It is because when a dielectric is placed between the charges , the dielectric gets polarized and the net electric field between the two charges decreases, hence force = charge x electric field also decreases. john
What is the Difference between dielectric and insulator?
The difference between dielectric and insulator lies in its field of application.Dielectrics are used to store the electric charges, while insulators are used to block the flow of electric charges ( they more or less act like a wall).While all dielectrics are insulators (they don't allow the flow of electric charges through them) all insulators aren't dielectric because they can't store charges unlike dielectrics.
How does force between 2 point charges changes if the dielectric constant of medium in which they are kept increases?
If the dielectric constant of the medium between the charges increases, the force between the charges decreases. This is because increasing the dielectric constant reduces the electric field strength between the charges, leading to a decrease in the force between them.
What is the relation between Dipole moment and Dielectric constant?
The dipole moment is a measure of the overall polarity of a molecule due to the separation of positive and negative charges. The dielectric constant is a measure of how well a material can insulate electric fields, which is influenced by the presence of dipoles in the material. Generally, materials with higher dipole moments tend to have higher dielectric constants.
What is a dielectric?
In physics, a dielectric is an insulating (or very poorly conducting) material. The material can be solid, liquid or gaseous. When a voltage difference is applied to top and bottom of a cylinder filled with a dielectric, no current will flow inside the cylinder because, unlike metals, a dielectric has no free-or loosely bound-electrons that can drift through the material. Instead, electric polarization occurs. The positive charges within the dielectric are displaced minutely in the direction of lower voltage, and the negative charges are displaced minutely in the opposite direction. When the molecules constituting the dielectric are polar (like water molecules), the molecules will align in the field, thus contributing to the electric polarization. Inside the cylinder no net charge density will arise because the charges in adjacent volume elements cancel. However, at the top and bottom of the cylinder an uncanceled surface charge will appear, and this surface charge (positive at the low voltage side and negative at the high voltage side) will oppose the electric field associated with the voltage difference. Thus, the polarization of the dielectric reduces the electric field inside the dielectric. Dielectric material is characterized by an intrinsic property called relative permittivity, usually denoted by εr (formerly this was known as the dielectric constant). The relative permittivity describes the ease of the polarization of the material and determines the size of the surface charge densities at the top and bottom of the cylinder. The Coulomb force between two permanent electric point charges placed inside a dielectric medium is 1/εr smaller than it would be in a vacuum due to the polarization of the dielectric medium by the point charges. The quantity of electric energy stored per unit volume of a dielectric medium is proportional to εr. The capacitance of a capacitor filled with a dielectric is a factor εr greater than it would be in vacuum. Reference: http://en.citizendium.org/wiki/DielectricDielectric is a substance that can transport electricity without conducting it.
What surrounds electric charges and exerts force on other charges?
An electric field surrounds the charge and exerts force on other charges.
Why is the dielectric constant value of covalent compounds is low?
The dielectric constant of covalent compounds is low because they have strong covalent bonds that do not allow for easy separation of charges when exposed to an electric field. This limits the ability of these compounds to induce an electric field within themselves and therefore results in a low dielectric constant.
What happens when air is replaced by a dielectric medium of constant k the maximum force of attraction between two charges separated by a distance?
In a dielectric medium with constant ( k ), the force of attraction between two charges separated by a distance decreases by a factor of ( k ) compared to in air. This is due to the polarization of the medium which weakens the electric field between the charges, thereby reducing the force between them.
What is meant about di-electric constant?
The relative permittivity of a material is its dielectric permittivity expressed as a ratio relative to the permittivity of vacuum.Permittivity is a material property that expresses the force between two point charges in the material. Relative permittivity is the factor by which the electric field between the charges is decreased or increased relative to vacuum.Likewise, relative permittivity is the ratio of the capacitance of a capacitor using that material as a dielectric, compared to a similar capacitor that has vacuum as its dielectric. Relative permittivity is also commonly known as dielectric constant, a term deprecated in physics and engineering.
What are bound charges?
Bound charges are electrical charges that are not free to move throughout a material but are instead associated with atoms or molecules within a dielectric or polarized material. They arise when an external electric field polarizes the material, causing a separation of positive and negative charges at the atomic level. This results in the formation of dipoles, which contribute to the material's overall electric polarization. Bound charges are significant in understanding the behavior of dielectrics in electric fields, as they influence the material's response to applied voltages.
How does a capacitor discharge when a resistor is connected if there is dielectric material separating the two plates and the flow of electrons Is there some kind of path created within the material?
When a resistor is connected to a capacitor with dielectric material between the plates, the capacitor discharges through the resistor. The dielectric material remains an insulator and does not directly create a path for electron flow. Instead, the charges on the plates induce an electric field in the dielectric, which stores energy until the capacitor discharges through the resistor, allowing the charges to flow back and neutralize.
Calculate the electric field expressions, using Gauss's Law?
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