All Questions
Tagged with electric-fields dipole
116
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How do we take angles in the limits of integrals in Physics?
I am looking at the following derivation of the potential energy of a dipole in a uniform electric field, paraphrased from phys.libretexts.org:
Consider an electric dipole $p$ placed in a uniform ...
2
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1
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Angle between dipole moment and electric field
I was learning the potential energy of a dipole because of torque from Halliday Resnick. In the given diagram, it said that if we move the system anticlockwise then the amount the Work that was done ...
user265103
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4
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Potential Energy of a Electric Dipole
I am trying to derive the potential energy because of torque in a dipole placed in a uniform electric field. But the answer I am getting is different from the answer I saw everywhere. So could someone ...
- 307
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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 ...
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Electric field outside a conductor
Say there is a conducting cylinder in a uniform external field. The charges on the cylinder surface will distribute and create a surface charge density.
Is there any reason the charge density would ...
- 1,038
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Dipole oscillators question from Feynman lectures 1.28-29
I am confused by the Feynman lectures Vol1Ch28-29. In all the pictures, there is an electric dipole oscillating vertically. We're assuming the intensity is $E^2$ and that in the far r limit $E$ ...
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2
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585
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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 ...
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215
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Dipoles in 2D and 'dipolar line'
I am currently studying the textbook Surface Enhanced Raman Spectroscopy -- Analytical, Biophysical, and Life Science Applications by Sebastian Schlücker, Wolfgang Kiefer. Chapter 1.2.3.2 Localized ...
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Curl of electric field due to dipole?
The field lines of electric field of dipole do seem to curl if seen geometrically. If water flow lines were of such shape, a ball would have rotated in it, doesn't this interpretation of non-zero curl ...
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6
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3k
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Why is electric field of dipole nonzero?
Why is the electric field from a dipole nonzero? Intuitively, I know there are electric field lines going from the positive to negative charge, so there should be an electric field.
But if I apply ...
user243050
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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
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How can sawdust do this in an electric field?
I found this really weird question and I was hoping for some insight.
Suppose we have a glass plate that's filled with oil. Some sawdust is sprinkled on top, such that it floats around. It looks like ...
- 2,356
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Electric energy from dipole moment
Conventionally one define electric energy as
$$
U = \frac{1}{2} \int \vec{E}(r') \cdot \vec{E}(r') d^3 x'
$$
where $\vec{E}$ is a Electric field.
And from textbook like Griffith, we know that ...
- 3,622
1
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536
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Energy of a dipole?
Suppose that we have a perfect dipole with $+q$ at $\vec{r}+\vec{d}$ and -q at $\vec{r}$, and that this dipole is in a uniform electric field $\vec{E}$,
Then:
\begin{equation}U=-\vec{p}\cdot \vec{E}....
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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 ...
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