All Questions
Tagged with electric-fields dipole
116
questions
3
votes
1
answer
2k
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Electric field in space created by intersection of spheres of charge [closed]
I am trying to calculate the electric field in space created by a body assembled by the intersection of 2 spheres.
The upper sphere, its center is at $$\frac{d}{2}\mathbf{\hat{z}}$$ with radius $R$ ...
- 201
3
votes
2
answers
429
views
What makes an insulator good for polarizing?
Water in an electric field become polarized easily, since the natural dipoles twist and turn to align with the field.
In non-polar insulating materials, a redistribution of charge can happen in the ...
- 51.4k
0
votes
1
answer
322
views
Finding direction of electric force of 2 particles [closed]
A molecule has its centre P of positive charge situated a distance of 2.8 × 10–10 m from
its centre N of negative charge, as illustrated in Fig.
The molecule is situated in a uniform electric field ...
- 45
7
votes
3
answers
1k
views
Does a AAA battery have a dipole moment?
Does a AAA or D battery have an electric dipole moment? Why don't the opposite poles of two batteries attract each other like that of magnet's?
- 151
3
votes
2
answers
3k
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Does field line concept explain electric field due to dipole?
Consider an electric dipole consisting of charges $-q$ and $+q$, separated by a distance $2a$ and placed in free space. Let $P$ be point on the line joining the two charges (axial line) at a distance ...
- 5,819
3
votes
1
answer
1k
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Are the axial electric field lines of a dipole the only ones that extend to infinity?
Consider an electric dipole and its electric field lines.
There will be many field lines that do not extend to or originate from infinity, but rather begin at the positive charge and loop back ...
- 791
3
votes
2
answers
10k
views
Motion of a dipole in an electric field
Assume that we have some non-constant electric field $E(x,t)$ and a point-dipole at a position $q$ with a constant dipole moment $\vec{p}$. How would you describe the time evolution, i.e. the motion ...
- 1,034
1
vote
1
answer
519
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Potential of a dipole with actual physical extension?
I think everybody here knows the equation that gives the potential of a point like dipole, but how does the field look like if you have e.g. a metal sphere with radius $R$ and a certain dipol moment, ...
- 1,880
2
votes
2
answers
5k
views
Minimizing potential energy of a dipole in an electric field
My test paper asked me which way a dipole should be orientated in an electric field to minimize its potential energy. My answer was that the dipole should lie parallel to the electric field with the ...
- 123
4
votes
1
answer
12k
views
Force from point charge on perfect dipole
Have a point charge and a perfect dipole $\vec{p}$ a distance $r$ away. Angle between $\vec{p}$ and $\hat{r}$ is $\theta$. Want to find force on dipole.
I'm having more than a little difficulty ...
- 1,681
9
votes
6
answers
8k
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What is the origin of the Dirac delta term in the dipole electric field?
I am a bit lost how one has deduced the formula for electric field with electric dipole because of some inconsistency between different sources. The Wikipedia article contains a delta function in the ...
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