BlogIIT-JEEDimensions Of Electric Flux

Dimensions Of Electric Flux


We characterize the Electric Flux as the pace of the stream of the electric field through a given region and it fluctuates straightforwardly with the number of electric field lines going by means of a virtual surface.

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    Switch on the mosquito repellent, you smell the aroma after some time. Thus, here, lines (electric field lines) of scent going through the region of the room are the electric motion.

    On this page, you will realize what is electric motion, electric transition definition exhaustively.

    Dimensions Of Electric Flux

    Significant Terms Used in the Concept of Electric Flux

    A portion of the significant terms that are utilized in the idea of electric transition and one should comprehend these terms to get the idea of electric motion. These terms are as per the following

    Electric Field: the electric field is a field or space around a steady or moving charge as a charged molecule or between two voltages. The other charged particles or particles in this space likewise experience some power applied by this field, the force and sort of power applied will be subject to the charge a molecule conveys.

    Electric Charge: It is an actual property of issue that makes it experience power while in an electromagnetic field. It additionally gives the molecule to have an electric field of itself. An electron has a charge of – 1 while the proton has a charge of +1. Neutrons are nonpartisan with charges equivalent to the 0 and furthermore slow down no other electric charges.

    Electric relocation field: The term electric dislodging field or electric acceptance is a vector field that is utilized in Maxwell’s condition, and In Physics, it is indicated by ‘D’.

    What Is Electric Flux?

    As far as electromagnetism, the electric transition is the proportion of the electric field lines crossing the surface. Albeit an electric field can’t stream without anyone else, it is an approach to depicting the electric field strength at any separation from the charge making the field. The electric field E can create power on an electric charge anytime in space.

    Idea of Electric Flux

    In the above text, we got the electric motion definition. Presently, we should get the idea of electric motion.

    • We should think about a theoretical (fanciful) planar component of region ΔS and a uniform electric field that exists on the plane surface.
    • We realize that the number of field lines crossing a unit region set typical to the electric
    • field E at a point is a proportion of the strength of the electric field by then.
    • Presently, define a boundary typical to the surface and call one side of it the positive ordinary to the surface.
    • Assuming that we place a more modest planar component of an area ΔS typical to E⃗
      now electric field lines crossing this region are relative to EΔS.

    Focuses to Remember

    • If it’s not too much trouble, note that it doesn’t imply that the quantity of field lines crossing this region is equivalent to E ΔS.
    • As the direction of the area component likewise concludes how much genuine varied motion is encountered, the region in the electric motion is a vector amount.
    • S.I. unit of electric motion is voltmeters (V m) and the components of the electric transition are – NC-1 m2 or Kgm3 s-3 A-1 .

    Motion of Electric Field

    Assuming we slant the region component by a point Ө (or we slant/turn E regarding the region component by a point Ө, the number of electric field lines crossing the region will be more modest.

    As the projection of region component ordinary to E is ΔS Cosө (or the part of E ordinary to region component is E Cosө).

    Subsequently, the number of electric field lines crossing region ΔS is corresponding to the accompanying parts in the situation:


    What is Flux in Electrical?

    We should assume that we draw a vector of the size ΔS alongside the positive typical. ΔS is known as the area-vector. The condition for the electric motion through a given region is:

    ΔΦ = e.E.ΔS =E(CosӨ)


    Φ = Electric motion which is relative to the number of field lines cutting the region component.

    Ө is the more modest point between E
    what’s more, ΔS.

    Presently, we should check the accompanying cases to decide on the electric transition at specific points out:

    1. At the point when E is typical to the area component times the extent of the region component,

    Ө = 0°, Φ is most extreme. (∵ Cos 0° =1)

    2. Whenever E is alongside the area component, Ө = 90°, Φ is zero.

    3. Whenever Ө > 90°, Cosө is negative, i .e., Φ is negative.

    Dimensional Formula of Electric Flux

    The formula(dimensional) of electric flux is [M1 L3 T-3 I-1]


    • M = Mass
    • I = Current
    • L = Length
    • T = Time


    ΦE (Electric Flux ) = EScosθ . . . . (1)

    Where E is the magnitude of the electric field and S is the Surface Area

    So, the formula(dimensional) of area (S) is [M0 L2 T0] . . . . (2)

    Since, Electric Field = [Force × Charge-1] . . . (3)

    The formula (dimensional) of,

    • Force = [M1 L1 T-2] . . . (4)
    • Charge = [I1 T1] . . . (5)

    by Substituting (equation4) and (equation5) in (equation3) we get,

    Electric Field = [M1 L1 T-2] × [I1 T1]-1

    ∴ The dimensional formula of Electric Field = [M1 L1 T-3 I-1] . . . . (6)

    by, substituting (2) and (6) in (1) we get,

    ⇒ Electric Flux = EScosθ

    So, ΦE = [M1 L3 T-3 I-1]

    Hence, the electric flux is represented(dimensionally ) as [M1 L3 T-3 I-1].


    Q: What is the dimension and unit of electric flux?

    Ans: The electric flux is given in unit Nm2C−1. Hence dimension of electric flux is [M1 L3 T-3 I-1]
    Q: What is the SI unit of electric flux?
    Ans: Talking about the unit, the SI base unit of electric flux is voltmeters (V m) which is also equal to newton-meters squared per coulomb (N m2 C1).
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