Electric Flux - What is the point? - Physics Stack Exchange
May 16, 2020 · We already know electric flux is the number of field lines passing through any arbitary area or surface. So we can say electric flux is directly proportional to the electric field lines. The more electric field lines passing through a area or surface the more the flux is. Now we can say the electric field lines depend on the total charges.As,if ...
Electric flux (positive, negative, or zero?) - Physics Forums
Sep 12, 2009 · What is electric flux? Electric flux is a measure of the flow of an electric field through a given surface. It is represented by the symbol ΦE and is measured in units of volts per meter (V/m). 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.
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 through hemisphere - Physics Stack Exchange
Aug 30, 2020 · The electric flux through the curved surface area of a hemisphere of radius R when it is placed in a uniform electric field is? Before this, I was taught the definition of flux as the number of field lines passing perpendicularly through an area. (If the lines aren't perpendicular, we use the component of field line that is)
Electric flux calculation in case of a cylinder - Physics Forums
Sep 13, 2015 · The formula for electric flux in the case of a cylinder is Φ = E*2πrh, where Φ is the electric flux, E is the electric field, r is the radius of the cylinder, and h is the height of the cylinder. How does the electric field affect the electric flux in a cylinder? The electric field affects the electric flux in a cylinder by determining the ...
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.
Definition Of Electric Flux - Physics Stack Exchange
Sep 17, 2021 · Flux is given by the formula ϕ=EAcosΘ or ϕ=∬𝑆𝐄⋅d𝐚 .So number of field lines is a rough estimate .To sum up flux is a scalar quantity which is the dot product of two vectors so taking direction into account is important and we need to calculate flux for different electric field differently and add them up to get the total flux ...
Electric Flux through a hemisphere - Physics Forums
Aug 30, 2007 · How is electric flux calculated for a hemisphere? Electric flux through a hemisphere can be calculated by using the formula Φ = E*A*cosθ, where Φ is the flux, E is the electric field, A is the surface area of the hemisphere, and θ is the angle between the electric field and the surface normal. What is the unit of electric flux through a ...
Electric Flux through the Face of a Cube - Physics Forums
Jun 24, 2018 · Electric flux is a measure of the electric field passing through a given area. It is defined as the dot product of the electric field and the area vector, and is measured in units of volts per meter squared (V/m 2 ).
electromagnetism - Normal Vector in Electric Flux and Gauss's Law ...
Aug 9, 2021 · In the case where the surface "encloses a volume" $\Omega$, such as the surface of a sphere, which is the boundary of a ball, we always choose $\mathbf{n}$ to "point outwards" because then, the divergence theorem states \begin{align} \int_{\Omega}\text{div}(\mathbf{F})\,dV&=\int_{\partial \Omega}\mathbf{F}\cdot \mathbf{n}\,dA …