I think flux density is electric field / unit area vector...Gordianus said:Divergence is defined as flux per unit volume
Flux density of an electric field, also known as electric flux density or electric displacement, is a measure of the strength of an electric field at a specific point. It is represented by the symbol D and is measured in units of coulombs per square meter (C/m^2).
Flux density is directly proportional to electric field strength. This means that as the strength of the electric field increases, so does the flux density. The relationship between the two is given by the equation D = ε0E, where ε0 is the permittivity of free space and E is the electric field strength.
The divergence of an electric field is a measure of how much the electric field is spreading out or converging at a specific point. It is represented by the symbol ∇ · E and is a scalar quantity. A positive divergence indicates that the electric field is spreading out, while a negative divergence indicates that the electric field is converging.
The divergence of an electric field is directly proportional to the electric charge density at a specific point. This means that as the amount of electric charge increases, so does the divergence of the electric field. The relationship between the two is given by the equation ∇ · E = ρ/ε0, where ρ is the electric charge density and ε0 is the permittivity of free space.
Flux density and divergence are important concepts in understanding electric fields because they help us visualize and quantify the strength and behavior of electric fields. Flux density allows us to measure the strength of an electric field at a specific point, while divergence helps us understand how the electric field is spreading out or converging. Together, these concepts provide valuable information for studying and analyzing electric fields in various applications.