Electric Flux: Definition, Equation & Examples

S ## is the area vector.In summary, the electric flux is defined as the product of the electric field and the area, Φ = EA. This equation takes into account the field strength, as it is not solely dependent on the charge. The flux can also be described as the number of field lines passing through a given area. This is represented by the equation dR = E.dS = Edscosx, where dS is the area vector.
  • #1
ewr
4
0
Why is the electric flux defined as (electric field) x (area), Φ = EA? How do you come up with that equation? Is it because the electric flux is proportional to the charge and surface area?
 
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  • #2
That's close, although it's not quite right to say that it's proportional to the charge; you can get the same amount of flux through a given surface with a small charge nearby or a larger charge farther away. That's why the field strength E appears in the formula.
 
  • #3
Flux Is defined as the number of field Lines passing normally through a given area.
Hence ## dR = E.dS = Edscosx ##
 

What is "electric flux"?

"Electric flux" is a measure of the amount of electric field lines that pass through a given area. It is a concept used in the study of electromagnetism and is defined as the electric field strength multiplied by the area it passes through.

What is the equation for calculating electric flux?

The equation for calculating electric flux is Φ = E · A · cos(θ), where Φ is the electric flux, E is the electric field strength, A is the area, and θ is the angle between the electric field and the normal to the area.

How is electric flux measured?

Electric flux is measured in units of volts per meter squared (V/m²) in the SI system. It can also be measured in units of Newton meters squared per coulomb (N·m²/C) in the CGS system.

What are some examples of electric flux?

One example of electric flux is the electric field created by a point charge, which can be visualized as a series of field lines radiating outwards from the charge. Another example is the electric field between two parallel plates, where the field lines are parallel and uniform. Electric flux can also be used to explain the phenomenon of electric induction.

How does electric flux relate to Gauss's law?

Gauss's law states that the electric flux through a closed surface is equal to the net charge enclosed by that surface divided by the permittivity of free space. This relationship allows for the calculation of electric field and charge distributions using the concept of electric flux.

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