All Questions
Tagged with electric-fields electrostatics
2,497 questions
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Point charge in front of dielectric boundary value problem method of images
Original link to the problem: https://photonics101.com/dielectrics/the-precessing-dipole-molecule.html
According to their setup, I have:
$\phi_2=\frac{1}{4 \pi \epsilon_2}\left(\frac{q}{R_{-}}+\frac{q'...
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1
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Confusion with Wikipedia's derivation of electric field for continuous charge distributions
Here is the page.
My confusion rises from $\textbf{r}'$, exactly from:
$\mathbf{r}'$ is the displacement vector from $\mathbf{r}'$ to $\mathbf{r}$.
Does it mean we're taking $\mathbf{r}'$ as origin?
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Method of images for an infinite half plane [duplicate]
When applying the method of image charges, is it necessary for the conducting half-plane to be grounded? If the conductor is not grounded, under what conditions can we still justify the use of this ...
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Charge induced inside a spherical conductor with a patch removed [closed]
When solving some problems meant for high school students, I came across this
A thin conducting shell of radius $R$ has surface charge density $\sigma$. A small aperture is made by removing a ...
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How can capacitance exist if a vacuum is used as a dielectric?
As we know, the capacitance is due to arrangement of electric dipoles of the molecules/atoms between the two plates of a capacitor. I read that: if a capacitor (with material medium) is placed in a AC ...
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Connecting one plate of charged capacitor to ground
Lets say I have a parallel plate capacitor of capacitance $C$. I charge it to a potential $V$ using a battery. now I disconnect the battery and the capacitor is supposed to have charges $CV$ and $-CV$ ...
- 885
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Intensity of electric field [duplicate]
Intensity of electric field at a point is defined as the force felt by a charge at that point due to the charge creating that field. Why then do we divide the force from Coulomb's law by the charge? ...
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How to compare the voltage of EMF source in an open circuit and a close circuit?
This diagram seems to assume that a charge inside an emf has two opposite forces which are non electrostatic and electrostatic force. When the circuit is closed, the former one will remain constant, ...
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Finding electric field from finite object using Gauss law
Gauss's Law is a powerful tool for calculating electric fields and flux, particularly when there's symmetry, such as in the case of infinite charge distributions. For example, we can easily calculate ...
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Electric field intensity on the tip of a hemispherical shell, not the centre [closed]
I am trying to calculate the electric field at the tip of a hemispherical shell, not the centre of it, but the zenith, the top of the cap...There is no solution of it anywhere online.
I've already ...
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Can I produce a continuous negative static charge in a material?
I'm trying to come up with a way to produce a negative static charge in a material. I already know there are various materials that can more easily hold a negative charge, and I could produce one ...
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Direction of the electric field caused by an infinitely long wire
Just a small question. How do you determine the direction of the electric field caused by a infinitely long wire. I'm following this lecture as reference: MIT8021E2018-V004900. It's quite different ...
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2
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What is electric flux? What does it signify? [closed]
I have already gone through
Why do outside charges not contribute to net flux through a surface, pt 2
Gauss' law and an external charge
Electric Flux - What is the point?
and many other similar ...
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Is $ A_1 E = A_2 E \cos\theta $ only valid if $ E $ is uniform across the surface?
In the context of electric flux, the relation
$$
A_1 E = A_2 E \cos\theta
$$
is often used when analyzing how an electric field passes through a tilted surface, as shown in the diagram below:
However,...
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Electric field only due to point charge
Consider a point charge situated near a spherical conductor. I understand that the net electric field inside the conductor is zero. However, is the electric field only due to the point charge zero or ...
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