Question

what is electric flux give a detailed description​

Answer 1

Electric flux is the number of electric field lines or electric lines of force passing through a unit area in given time . It is a scalar quantity .

It can also be defined as rate of flow of electric field in a particular area is called electric flux .

Electric flux is the dot product of close integral of Electric field and surface area vector .

$\tt \phi = \oint \vec{E} . d \vec{S}$

According to Gauss' law , the electic flux passing through a closed surface is equal to $\dfrac{1}{\epsilon_0}$ times the total charge enclosed inside the Gaussian surface .

Answer 2

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Electric Flux over and area is equal to the total number of electric field lines crossing this area.

The Product of area and electric field at a point is called electric flux, but area and electric field should be perpendicular to each other .

The Dot Product of electric field and area vector is called flux .

The Electric flux over a closed area can be positive, negative, 0 depends on :-

• Θ < 90°
• Θ = 90°
• Θ > 90°

$\displaystyle \phi_E = \int\vec{E}. \vec{ds} = \int Eds . \cos \theta$

i. It is a scalar quantity.

ii. It's SI unit is N${m}^{2}$

iii. Electric Flux Density → E = Θ/A