All Questions
7
questions
1
vote
1
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96
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Potential energy of an electric dipole without any external field
What is potential energy of an electric dipole without any external field?
If its 0 then why? Wouldn't the charges get attracted thus do work so they must have some potential energy.
- 367
0
votes
1
answer
435
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Doubt in the interaction energy of the dipole in an electric field
Consider a dipole ($\vec{p}$) in an electric field ($\vec E$) making an angle $\theta$ with the field.
We can see that $V_1-V_2=Ed\cos\theta$
In books, the derivation for the interaction energy of ...
- 436
-2
votes
4
answers
1k
views
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
1
vote
1
answer
310
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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
vote
1
answer
5k
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General derivation of the potential energy of a dipole in an external electric field
In a external electric field, the torque that a dipole feels is $\vec{\tau} = \vec{\mu} \times \vec{E}$, and the corresponding potential energy is given by $U = - \vec{\mu} \cdot \vec{E}$.
If the ...
- 2,283
0
votes
2
answers
2k
views
Convention of potential energy in dipole and the conservation of energy
As I understand it, the convention for the potential energy of a dipole in a uniform electric field has the following zero point:
$U(\pi/2)=0$
I understand how this makes the calculation easier to ...
- 1
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