Let we place a rectangular wire in the field. It can be considered as the number of forces that are intersecting a given area. Let E represents how many electric fields are in 1 square meter area (though it is not the correct definition of E, but our analogy is correct as the magnitude of E is proportional to the density of electric field line). Electric flux is an important property of an electric field. A measure of flow of the electric field through a given area. So, the magnitude of E is proportional to the density of electric field line. If the field lines are dense, the electric field is strong. It is used to calculate the electric field due to a continuous distribution of charge in particular when there is some. Figure 2.2.7 Various Gaussian surfaces and charges. Gauss’s law is an other way to express Coulomb’s law that quantifies the amount of force between two stationary electrically charged particles or the electric field due to a point charge. Electric field lines also represents the strength of electric field. Electric Flux through Gaussian Surfaces Calculate the electric flux through each Gaussian surface shown in Figure 2.2.7. The magnitude of E at a point is how much force will be applied on 1 coulomb positive charge in that point and the direction of E is the direction of that force. Electric flux measures how much the electric field flows through an area. Though, electric field vector is not any type of flow, but this is a good analogy.Įlectric field vector E represents the strength and direction of electric field at any place. Now, for electric flux, think the electric field vector E in place of v. ![]() ![]() When the same plane is tilted at an angle, the projected area is given as Acos and the total flux through this. If the plane is normal to the flow of the electric field, the total flux is given as: EA. In this case, the fluid flux is the rate of fluid flow. The total number of electric field lines passing a given area in a unit time is defined as the electric flux. For the case of the electric field, we define an analogous quantity and call it electric flux. Now, we have completed the analogy of fluid flow. Therefore the flux going out of the surface d A isV. From the figure, we can see that, the direction of A is perpendicular to the plane of rectangular wire.
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