Electric field lines are considered to originate on positive electric charges and to terminate on negative charges. Where θ is the angle between the field lines and normal to the area. electric flux, property of an electric field that may be thought of as the number of electric lines of force (or electric field lines) that intersect a given area. In this case we have to find the projection of the area A which is perpendicular to the field lines.The area of this projection is Now we consider the case in which A is neither perpendicular nor parallel to field lines but is inclined at angle θ with the lines as shown in figure This is for the area perpendicular to vector E. For a uniform electric field E passing through an area A, the electric flux E is defined as: E x A. In this case angle between E and A is 90°. Electric flux depends on the strength of electric field, E, on the surface area, and on the relative orientation of the field and surface.

Abstract: Volume integral equations for modeling biological tissues in the frequency. If area is held parallel to the field lines E ,shown in figure below What is the electric flux density on the surface of the cylinder Gauss equation is: QT, the total charge enclosed, q coulombs per meter x L meters. A Regularized Electric Flux Volume Integral Equation for Brain Imaging. In this case ,angle between E and A is O° This means that if 1m² area is held perpendicular to the field lines at this point,4 field lines will pass through it.Ĭonsider a certain area A is held perpendicular to the field lines E but direction of A is parallel to E as shown in figure below. When we place an element of an area in an electric field ,some of the lines of force pass through it.In order to give a quantitative meaning to flux ,the field lines are drawn such that the number of field lines passing through a unit area held perpendicular to field lines at a point represent the intensity E of the field at that point.Suppose at a given point the value of E is 4N/C. Its SI unit Nm²/c.Below figure showing electric flux through a surface normal to E.

Electric flux equation