Questions tagged [dipole]

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252 questions
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Electric current dipole moment

Electrical Current Dipole of dipole moment $\mathbf{p_{EC}}$ has unit of $A\cdot m$. My knowledge of dipole moments unfortunately stopped in high school where I learned that dipole moment $\mathbf{p}$ ...
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How will a polar molecule affect another molecule nearby, why it feels a relatively large force?

Mean position of the negative charges and positive changes are not at the same point (polar molecule) how will that affect another molecule nearby, why it feels a relatively large force? Will the type ...
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Why is parallel dipole to electric field is stable equilbrium

For a dipole making $0$ degree angle with field and for making $180$ degrees it is stable and unstable equilibrium respectively. Why?
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Vectors, their representation and dipole moment

I know that the length of an arrow representing a vector gives represents the magnitude of that vector, now consider a force vector. $\vec{F}$=m$\vec{a}$ , therefore in space a force vector ...
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Divergence and rotation of ideal dipole field at d --> 0

I am working on an assignment in vector calculus where we are supposed to find the divergence and the rotation of the electric field caused by an ideal dipole when the distance d between the charges ...
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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 ...
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What is dipolar charge distribution?

An electric dipole is a system of two opposite point charges when their separation goes to zero and their charge goes to infinity in a way that the product of the charge and the separation remains ...
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Nature of interaction of two magnetic dipoles

Is the force of interaction between two magnetic dipoles a conservative force? If not, how do we find that force?
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How to derive a force expression for dipole-dipole interaction

Background I recently asked a question about how to derive a force expression between a point charge and a dipole. This got me wondering whether I could extend this solution to dipole-dipole ...
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Is there an electric field in a poled piezoelectric crystal at rest?

From my understanding, after a piezoelectric crystal is poled, all the dipoles are roughly aligned inside it, so that the piezoelectric effect is not negligible. However, wouldn't that result in a ...
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How to cast dipole point charge force expression from cylindrical to Cartesian coordinates

Background I am currently building simulations of molecular dynamics and one thing I want to model is dipole interactions. I recently came across this post about calculating the force between a point ...
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Electric dipole moment of two infinite charged lines

Two parallel infinite opposite charged lines (of uniform density $\lambda$) are placed at distance $L$ from each other. Need to calculate the electric dipole moment of this system. How do you do such ...
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Why is the singularity not taken into account?

In this article "Reflections on Maxwell’s Treatise", Section 4.2, it says: He replaces $\mathbf{m}$ with a volume element of magnetization $\mathbf{M}\ dV$ , integrates over $V$ , and lets the same ...
I'm having some trouble understanding the reasoning behind the final note in the following worked problem: An HCl molecule has a dipole moment of $3.4\times10^{-30}\:\rm C\:m$. Assuming that equal ...