The total number of electric field lines passing through a given area in a unit time is the electric flux. positive if it is positive, negative if it is negative. If a net charge is contained within a closed surface, then the total flux through the surface will be proportional to the enclosed charge, i.e. So, the net or total, the electric flux will be zero. The negative flux is just equal to the magnitude of the positive flux. If there is no given net charge within some closed surface then every field line directed into the given surface will continue through the interior. Therefore it is analogous to the flow of liquid as discussed above. The electric field is behaving in a similar way. Here, \(dA cos\theta\) is the projected area of the plane towards the perpendicular direction of the flow of the liquid. Then the total volume of liquid crossing through the plane per unit time is given as \(v ×dA \ cos \theta\). When the plane is not exactly normal to the flow of the fluid then it will be inclined at an angle \(\theta\). Then the volumetric flow of the liquid crossing that plane normal to the flow will be given as v × dA. Let us consider a small unit area of the plane given as dA.
We will take the cross-sectional plane of the pipe. Source:en. Electric Flux formula What is electric Flux?Ĭonsider the flow of water with some velocity v in a pipe in a certain fixed direction, suppose towards the right. In this article, the student will learn the Electric flux Formula with examples. Field lines directed into the closed surface are negative and those directed out of a closed surface are positive. Electric field lines are generally considered to start on positive electric charges and to finish on negative charges.
It can be considered as the number of forces that are intersecting a given area. Electric flux is an important property of an electric field. Also, an analogy between the flux of an electric field and that of water will be explained.
In this topic, we will discuss the important concept of electric flux, its computation.