Definition:Electric Flux Density
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Definition
Electric flux density is the measure of the intensity of an electric field inside a substance $S$.
It is defined as:
- $\mathbf D = \varepsilon_0 \varepsilon_r \mathbf E$
where:
- $\mathbf E$ denotes the electric field strength at a given point within $S$
- $\varepsilon_0$ denotes the vacuum permittivity
- $\varepsilon_r$ denotes the relative permittivity of $S$
Electric flux density is a vector quantity.
Symbol
- $\mathbf D$
The usual symbol used to denote electric flux density is $\mathbf D$.
Its $\LaTeX$ code is \mathbf D
.
Dimension
Electric flux density has the dimension $\mathsf {I T L^{-2} }$.
Units
The SI unit for electric flux density is the coulomb per square metre:
- $\mathrm {C / m^2}$
The CGS unit of electric flux density is the electrostatic unit $\mathrm {e.s.u.}$.
Conversion Factors
\(\ds \) | \(\) | \(\ds 1\) | e.s.u. | |||||||||||
\(\ds \) | \(=\) | \(\ds \dfrac 1 {12 \pi} \times 10^{-5}\) | coulombs per square metre |
Also see
- Results about electric flux density can be found here.
Sources
- 1969: J.C. Anderson, D.M. Hum, B.G. Neal and J.H. Whitelaw: Data and Formulae for Engineering Students (2nd ed.) ... (previous) ... (next): $1.$ Units and Abbreviations: $1.2$ SI units $(2)$ Derived units