# Tag Info

Accepted

### Why should a dipole have zero net charge?

The concept of a dipole moment, and other moments such as a monopole, quadrupole, etc, comes from the process of writing a field as a sum of components called multipoles. This is known as a multipole ...
• 329k
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### Do neutrons exhibit momentary small charges due to the movement of its quarks?

It seems that within the standard model of particle physics A permanent electric dipole moment of a fundamental particle violates both parity (P) and time reversal symmetry (T). These violations ...
• 221k
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### Electric field due to a hydrogen atom

Especially the hydrogen atom, with a proton in the nucleus and an electron revolving acting as a dipole This is a problematic way of understanding the hydrogen atom ─ it basically tries to insist on ...
• 123k
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### Why is dipole the simplest source in electrodynamics?

You are correct that in electrodynamics the only real sources of radiation are non-uniformly moving charges. However, when you solve for the potentials, you get some intricate expressions, the so-...
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### Why is dipole the simplest source in electrodynamics?

Simple reason: an oscillating monopole field in a region isolated from currents would violate charge conservation. Note a monopole field is not the same as an oscillating monopole charge, which, as ...
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### (Special relativity) A tilted dipole composed of $+q$ and $-q$ point charges moves at a horizontal velocity. Will it rotate?

According to the Lorentz transformation formula for the electric field, we have: $$\mathbf E_\perp' = \gamma(\mathbf E_\perp+\mathbf v\times \mathbf B_\perp)$$ Since $\mathbf B=0$ in the rest frame, ...
• 2,015
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### Derivation of Interaction energy of Dipole - Induced Dipole Interaction

I don't think you need quantum mechanics to understand what's going on in dipole-induced dipole interaction. The basic mechanism is quite simple and just the details of the calculations change by ...
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### What do we mean with magnetic monopole and dipole?

What do we mean with magnetic monopole and dipole? I can not find a way to relate magnetic monopoles and dipoles with electric ones. I do not understand their outcomes. Luckily, there exists a ...
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