All Questions
18
questions
0
votes
2
answers
99
views
When deriving work from an uniform electric field and dipole why do we need to integrate it?
If the force is constant in a uniform field wouldn't that mean you dont need to integrate to find work?
user361546
2
votes
2
answers
80
views
I can't seem to figure out a way to compute a gradient without reference coordinates
I'm not sure if this question is better asked here or in Mathematics but here it goes:
I'm studying electric dipoles, and this exercise I'm working on asks for the energy between 2 dipoles, given by $$...
- 23
1
vote
4
answers
384
views
Dielectric constant of crystals: Feynman's mistake?
Feynman mentioned in his lecture that we can, in some way, obtain dielectric constant of crystals by summing up the electric field due to dipoles. For example, equation (11.33) from above link shows ...
- 67
1
vote
0
answers
109
views
Confusion over Gauss' law for an ideal electric dipole
To find the charge density of an ideal electric dipole centred at the origin, I can evaluate the divergence of $\vec{E}(\vec{x})$ which equates to evaluating the laplacian of the potential.
Working ...
user161157
0
votes
0
answers
87
views
How possible is using complex variables to model the electric field system of a dipole? [duplicate]
If one considera a dipole system, is it possible to model the system using complex variables and if ao, how can we use complex analysis to model it? I have the idea that we can model dipole moment as ...
- 3
1
vote
2
answers
123
views
Electric field in matter- Bound Charges why the term $\rho_b$ exist?
I am reading the book of Griffiths, Introduction to electrodynamics, and he explains in this chapter about the bound charge densities $\sigma_b$ and $\rho_b$
but I do not understand how is it possible ...
- 555
0
votes
2
answers
585
views
Direction of Force on a Dipole in a given Electric field
How should I determine the direction of the force in the given case: (p is the electric dipole moment)
Using the following formula
My book has the following :
I am unable to understand the given ...
6
votes
1
answer
207
views
Direct detection of the electric field of an electromagnetic wave from an oscillating dipole
The principle behind the detection of gravitational waves is that stellar-mass sources can act as coherent oscillators, producing a gravitational wave with a well defined, and relatively slowly ...
- 133k
0
votes
2
answers
527
views
Why is dipole potential independent of azimuthal angle?
In the formula for dipole potential in spherical coordinates, there is no dependence on azimuthal angle. I don't see why this is as by varying the azimuthal angle, i.e changing our position on the x y ...
- 1,525
3
votes
1
answer
3k
views
Dipole Inside Cavity of A Spherical Conductor
Consider the following case:
There is a short electric dipole placed arbitrarily inside a spherical cavity inside a solid,uncharged conducting sphere
We need to find electric field at a point ...
- 257
0
votes
1
answer
49
views
What is the mechanism by which light induce polarity in tiny particles?
I understand that the electric field in light induces polarity in tiny microparticles for example. Can someone explain the mechanism of how the vibrating electric field in light induces a dipole ...
- 107
2
votes
1
answer
679
views
Resolution of dipole moment into components [closed]
In the derivation that involves finding the electric field due to a dipole at a general point on a plane in which the dipole lies, the following procedure is followed:
Resolve the dipole moment into ...
- 137
0
votes
1
answer
550
views
Electric field due to a short dipole at a point $A$ on the axis
There is a short dipole $ X,Y$ of charge $+q$ and $-q$ placed along the x-axis and then we consider the point at $A$ which is far away from the dipole and lies on the x-axis. The electric field $E_\...
- 185
0
votes
2
answers
953
views
What is the effect of water molecules in an oscillating electric field?
Say, we have an alternating current source of max voltage V, and frequency v= 1 GHz connected to 2 plates as in a capacitor with an air gap of distance d, thus we get an oscillating electric field E, ...
- 49
0
votes
2
answers
4k
views
pure dipole vs. physical dipole
So, let's assume that I have an electric dipole that comprises of charges $+q$ and $-q$ with separation of d placed in a non uniform electric field induced by charge $+Q$ which is a distance $x$ away ...
- 69