Electric Flux - What is the point? - Physics Stack Exchange
May 16, 2020 · 6. Electric flux is a defined quantity that is proportional to the no. of field lines passing through a given area element for a given electric field. It is not proportional to the relative density of field lines, which would supply information regarding the strength of the field at that point. Electric flux, it seems to me, does not supply us ...
How can electric flux be negative? - Physics Stack Exchange
Apr 24, 2020 · Typically in this case we define "outward" flux to be positive, in which case the total electric flux through the surface will be a positive number since the electric field lines point out of a positively charged particle. If we repeated the same experiment with a negatively charged particle we would get a negative answer.
Find Electric Flux through cube's side, point charge on corner
Sep 1, 2006 · To find the electric flux through a cube's side, we can use the formula Φ = Q/ε0, where Q is the charge of the point charge on the corner of the cube and ε0 is the permittivity of free space. This formula assumes that the cube's side is perpendicular to the electric field created by the point charge. 5.
electromagnetism - Normal Vector in Electric Flux and Gauss's Law ...
Aug 9, 2021 · This is how Gauss's law was formulated. For an open surface: ϕE = ∫E . dA ϕ E = ∫ E →. d A →. where the angle θ θ between E E → and dA d A → is chosen such that θ ≤90∘ θ ≤ 90 ∘. For a closed surface: ϕE = ∮E . dA ϕ E = ∮ E →. d A →. where the direction of dA d A → is chosen such that dA d A → points ...
gauss law - How does electric flux being equal to zero imply …
Nov 9, 2020 · The flux is the integral of E $\bullet$ dS where E is the electric field at a surface element dS. If the flux = 0, that just means that this integral is 0. If the flux = 0, that just means that this integral is 0.
Electric flux through hemisphere - Physics Stack Exchange
Aug 30, 2020 · In fact, it does not matter what the shape on the other side is -- whether a hemisphere or a cone or anything else -- just as long as it is a closed surface and the Electric Field is constant, it is going to 'catch' as much flux as the flat base. Therefore, the total flux is always going to be ϕE = E ⋅ Area of the Base. ϕ E = E ⋅ Area of ...
Electric Flux through the Face of a Cube - Physics Forums
Jun 24, 2018 · The electric flux through the face of a cube is directly proportional to the size of the surface. This means that as the area of the surface increases, the electric flux also increases. This relationship can be seen in the equation Φ E = E * …
Electric flux, vector or scalar? - Physics Forums
Dec 11, 2012 · The electric flux density vector is used to calculate the electric flux passing through any and all arbitrarily oriented cross sectional areas dA in space. Of course, for a given electric flux density vector, the electric flux passing through a given surface area will depend on how the surface area is oriented in space.
Electric flux of a closed surface, - Physics Stack Exchange
I have problem with the equation of electric flux. I use one book of fundamental physics and another book of electromagnetic engineering; the two of them give different equations for electric flux. In the physics book, the electric flux is defined as the dot product of electric field and the normal vector of a surface then for a surface $$\Phi ...
Electric flux in a non-uniform field - Physics Stack Exchange
There are two important points you should know if the so-called electric field is non-uniform and a Gaussain surface is placed in that field and the result is a net flux through that surface: 1). There exists a net charge inside the Gaussian surface causing that field and giving a net flux. 2).