Search results

{{r|Electric field}}

{{r|Multipole expansion of electric field}}

...umber density ''N'' (number of particles per unit volume) in an external [[electric field]] '''E'''. The sum of '''E''' and an internal field '''E'''_int i ...relation between '''P''', the [[electric displacement]] '''D''', and the electric field '''E''' follows

{{r|Multipole expansion of electric field}}

{{r|Multipole expansion of electric field}}

{{r|Electric field}}

...ilon;_r is related to the proportionality constant between the [[electric field]] '''''E''''' and the [[electric displacement]] '''''D''''', namely '''''D' ...r to make the connection with the definition above, we recall that the [[electric field]] above a charged plate of infinite size is independent of the distance fro

...ectric displacement]] '''D''' (a [[vector field]] closely related to the [[electric field]] '''E'''). The concept was introduced by [[James Clerk Maxwell]] in 1861.< ...rcling the wire. In a very similar way, a displacement current (a changing electric field) causes a magnetic field encircling it. It is the displacement current in t

...ed to the proportionality of [[current density]] <math>\vec J</math> and [[electric field]] <math>\vec E</math> that is observed in many materials (especially metals

...arges causing the field and hence the test particle does not influence the electric field. The direction of the electric field is by convention such that it points away from a positive charge and points

{{r|Multipole expansion of electric field}}

{{r|Electric field}}

In Gaussian units the [[electric field]] '''E''', the [[polarization]] '''P''', the [[electric displacement]] '''D <tr> <td><i>E</i> </td> <td>[[Electric field]] </td> <td>V/m </td> <td>10⁴/<i>c</i

...rostatics]], Gauss' law is a theorem concerning a surface integral of an [[electric field]] '''E'''. In [[Vacuum (science)|vacuum]] Gauss' law takes the form: ...rface element d''S'', pointing outward. The vector '''E'''('''r''') is the electric field at the position d'''S''', the dot indicates a [[dot product]] between the v

{{r|Multipole expansion of electric field}}

At a microscopic level, the magnetic flux '''B''' and the electric field '''E''' determine the behavior of charges. For example, a single moving cha

...ow determination of exact solutions of the [[Maxwell equations]] for the [[electric field]] and [[magnetic flux density]] generated at an arbitrary location by an id ...is the [[magnetic constant]] of the [[SI units]].With these potentials the electric field and the magnetic flux density are found to be (dots over symbols are time d

{{r|Multipole expansion of electric field}}

where the electric field '''E''' is integrated around a closed path ''C''.

...etc.). As its name suggests, it consists of two [[vector fields]], the [[electric field]] '''E''' and the [[magnetic field]] '''B'''. The '''Fourier expansion of The electric field obeys one of the Maxwell equations, in electromagnetic [[SI]] units it read