# Questions tagged [gauss-law]

A law in classical electromagnetism and Newtonian gravity which relates (charge) density to the divergence of a field, or alternatively the charge in a volume to the flux through the bounding surface.

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### Can such a field line exist between two positive charges? [duplicate]

I am aware of the usual diagram of field lines between two positive charges. My question is that is such a field line wrong, if so why?
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### Parallel plates uniformness

All questions are highly related, so I preferred to ask them together. Q1: Why is the electric field uniform between parallel plates and is it only uniform between? and not outside? Q2: Why uniform? ...
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### ELECTRIC FLUX CALCULATION [closed]

A point charge +q is placed on centre of face CBEH of cube ABCDGHEF Find a) net electric flux due to +q charge through the cube b) electric flux through each individual face of the cube For part a of ...
48 views

### $E$-Field within uniformly charged cylinder surface

Say I have an infinitely long hollow cylinder, and on its surface I have a uniformly distributed surface charge. Now, I want to calculate the electric field of that cylinder both inside and outside. ...
84 views

### Can we use superposition of electric fields to conclude that between plates of capacitor the field is $2\frac{\sigma}{\epsilon_0}$? [duplicate]

Consider a parallel plate capacitor. This is a setup of two very large parallel plates, each a conductor and each with area $A$, and one having positive charge $Q$ and the other negative charge $-Q$. ...
1 vote
134 views

### Unknown integral identity in derivation of first Maxwell equation

Reference: "Theoretische Physik" (2015) by Bartelsmann and others, page 391, equation (11.23). While deriving the first Maxwell equation based on Coulomb's law, the authors are using the ...
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### Electrostatics, using Gauss law to find electric flux through continuous body distributions

While calculating electric flux through an uncharged ring kept near a charge, we tend to draw a spherical Gaussian surface that covers the ring by edges but while using the gauss law, we tend to take ...
1 vote
33 views

### Symmetry which shows that the magnitude of electric field due to infinitely large sheet doesn't depend on perpendicular distance from the sheet

The magnitude of electric field due to a uniformly charged, infinitely large sheet is $$E = \frac{\sigma}{2\epsilon_0}$$ ($\sigma$ is surface charge density) It is a constant for all points in space, ...
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### Why is the electric flux due to a point charge on a ring the same as of a disc?

flux means amount of ef lines passing perpendicular to a surface. but the ring is hollow so the efls would go through some part of the ringand else will just pass from its hollow part.in case of a ...
29 views

### Force between charged hemispheres

The question has been asked before, but most of the questions I found were for solid spheres. I'm asking about a hollow sphere/shell. Also, I'm not looking for a calculation. I have a conceptual ...
38 views

### Electric Field Due to Large Sheet

In a recent lecture, our physics professor was going over the Gauss's law derivation for the electric field due to a large (flat) sheet using $$\oint\vec{E}\cdot d\vec{A}=\frac{q_{in}}{\epsilon_0}$$ ...
161 views

### Electric Field for Non-Symmetric Charge Distributions

In real-world situations where charge distributions are asymmetric and continuous, how is the electric field calculated? Gauss's Law in integral form can't be practically applied for asymmetric ...
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### Does Gauss's law (Maxwell 1st eq) have to change when the conductivity of the material is non-zero?

Studying Lorentz-Drude model on any book (e.g. Optical proerties of solids by Wooten, Fisica II by Mencucini-Silvestrini et c.) one finds the following equation relating the relative dielectric ...
1 vote
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### If flux is number of electric field lines passing through a surface or 3D figure, that means it is a number so why it is not dimensionless? [duplicate]

My teacher said that electrostatic flux is the number of electric field lines passing through a surface or a 3-dimensional figure, and explained its mathematical expression as $Φ = ES\cosθ$. However,I ...
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### If a Gaussian surface is assumed in a non-uniform electric field and charge enclosed is zero, is the net electric flux coming out still zero?

Assume a Gaussian surface in a non-uniform electric field that is directed along X-axis. Say the field is getting weaker as we go along positive X direction and it's constant along Y and Z directions. ...
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### Where can I include the distance between the plates in the capacitor equation? [duplicate]

E (volts per meter) = Q (coulomb) / εo (8.85e-12) x Area (m2) E* vacuum = 1e18 volts per meter https://study.com/skill/learn/how-to-use-gauss-law-to-find-the-electric-field-inside-a-parallel-plate-...
34 views

### How is Electric Field inside a Conducting Spherical Shell containing a Charge inside is zero?

I know that this may be a duplicate question but wait, I want to analyse the phenomenon from a different perspective. For a conducting plane sheet of charge There should be positive charge at both ...
1 vote