# Questions tagged [magnetic-moment]

The magnetic moment of a magnet is a quantity that determines the force that the magnet can exert on electric currents and the torque that a magnetic field will exert on it. A loop of electric current, a bar magnet, an electron, a molecule, and a planet all have magnetic moments.

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### Magnetic moment produced by a charge in translatory motion (with no orbital motion)

A moving charge produces a magnetic field, while its magnetic moment is given by $$\mu = -g\frac{q}{2m}\textbf{L}$$ where, $g$ = gyromagnetic ratio, $q$ = charge, $m$ = mass, L = orbital angular ...
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### Why Is an Inhomogenous Magnetic Field Used in the Stern Gerlach Experiment?

The apparatus used in the Stern Gerlach experiment is somewhat like the one shown below with magnetic pole pieces of different shapes producing an inhomogeneous magnetic field. But what would have ...
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### Crystal electric field effects on spin-orbit coupling

Can someone highlight in general the correlation between crystal-electric-field, spin-orbit coupling in case of 3d7 ions under tetrahedral crystal field environment and their mutual effects on ...
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### Angular momentum and magnetic moment [duplicate]

I have just started studying MRI physics and was reading F.Bloch’s paper on Nuclear Induction. https://doi.org/10.1103/PhysRev.70.460 In page 463, it is mentioned, To obtain this variation does not ...
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### Vector potential inside and outside an uniformly charged rotating sphere of radius $a$ [closed]

A sphere a radius $a$ has a uniform charge density $\sigma$. This sphere is rotating around the $z$ axis at a constant angular velocity $\omega$. We are asked to check the vector potential $\vec{A}$ ...
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### Can the electron's magnetic moment be considered as an electric moment?

The electron is known to have an intrinsic magnetic moment, where a magnetic moment is generally defined as "the magnetic strength and orientation of a magnet or other object that produces a ...
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### What are the equations to describe the flip of magnetic moment of a permanent magnet due to external magnetic field?

If we push a much smaller magnet with larger magnetization toward a larger one with same pole facing each other.(S-S or N-N) Repulsion increases as we move forward, but when it is close enough for the ...
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### How is the magnetic field zero when the magnetic dipole moment is zero?

So, my teacher was trying to explain me about Diamagnetic substances and he said that : Suppose the atom of an element has 4 electrons revolving around the nucleus in 4 different orbits. The ...
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### Magnetic field inside a ferromagnetic material

Let us suppose that there is a block of a ferromagnetic material inside a very long ideal solenoid, the magnetic field lines inside are in a straight line perpendicular to the surface of the block at ...
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### Torque on Circular Current Loop in Uniform Magnetic Field [closed]

I am trying to derive the expression: $\tau=\mu\times B$, for a circular current loop in a uniform magnetic field. $\mu$ is the magnetic moment of the loop, so it will be $\mu=IA$, where A is the area ...
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### Divergence of the magnetic field $H$

it is known (although I have not found much information about it on books and websites) that, while the divergence of $B$ is always zero ($\nabla\cdot B = 0$), we cannot say the same about $H$: the ...
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### Gluon radiation from a nucleon?

Due to the fact that neutrons and protons consist of quarks (i.e. are not really Dirac particles), their magnetic moments differ from the so-called "nuclear magneton" (i.e. the natural unit ...
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### Why does the tangential component of the magnetic field increases inside a material?

Let us suppose that there is a constant uniform magnetic field perpendicular to the surface of a block of iron. Why does the magnetic field increases inside the block? Is it due to the alignment of ...