# Electric Flux: Does Material Matter?

• zinedine_88
In summary, the electric flux is not dependent on the material of the surface it passes through, as it is an imaginary surface based on Gauss law. The magnitude of the electric field may vary based on the material, but the flux is calculated by taking the dot product of the net electric field through the surface. There are no specific constants for the permeability of electric field for each material, as the general idea is that the electric field is always calculated by taking the dot product, regardless of the surface. This concept may be confusing for those new to studying electricity.
zinedine_88
i wonder how come the electric flux doesn't depend on the MATERIAL that the area which the Electric field goes through is made of?>?>>??>

The surface through which the electric field passes through is imaginary, just as what you would expect from Gauss law. The magnitude of the electric field at the surface may depend on the material it is passing through but once you have taken that into account, the flux is simply the dot product of net electric field through that surface.

so are there any constants for each material "permeability" of electric field... :)

or u are saying that the general idea is that the E field is always the dot product... regardless the surface.. :) or something like that... i just started studying electricity and I am kinda lost yet :)

## 1. What is electric flux?

Electric flux is a measure of the total number of electric field lines passing through a given surface. It is a scalar quantity and is typically represented by the symbol Φ.

## 2. How is electric flux affected by the material of the surface?

The material of the surface does not affect the electric flux. It is solely determined by the electric field and the geometry of the surface.

## 3. Can electric flux be negative?

Yes, electric flux can be negative. This occurs when the electric field lines are passing through the surface in the opposite direction to the normal vector of the surface.

## 4. What is the unit of electric flux?

The SI unit of electric flux is volt-meters or V-m. It can also be expressed in terms of newton-meters squared per coulomb or Nm2/C.

## 5. How is electric flux calculated?

Electric flux is calculated by taking the dot product of the electric field vector and the normal vector of the surface. This can be represented by the equation Φ = E ∙ A, where E is the electric field and A is the surface area.

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