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.
Questions tagged [magnetic-moment]
689 questions
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What is the magnetic moment, and what does it have to do with the spin of the electron?
So when an object spins (like the electron), it is said to have a magnetic moment. Now, I do not understand what they mean when they say that it has a magnetic moment.
When I did research, I saw this picture from which I assumed that the magnetic…
user510
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Is it possible to create only a magnetic wave?
I want to know if its possible to create only a magnetic field,which i can direct to a certain chosen object?
Vkey Kesavan
- 61
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Larmor precession and relaxation
I'm trying to wrap my head around Larmor precession and NMR pulses, but there's something that seems totally confusing and contradictory to me, and I haven't been able to find a definitive answer yet.
So, when I read about Larmor precession,…
Benjamin Márkus
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Why does the loop expand?
My textbook had an example question:
"A loop of irregular shape carrying current is located in an external magnetic field. If the wire is flexible, why does it change to a circular shape?"
And the answer reads:
"It assumes a circular shape with its…
ABC
- 75
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Can magnetic susceptibility χ be -1?
Is it practically possible that the magnetic susceptibility of a substance is -1?
I thought so as such a substance could completely cancel the magnetic field, but I couldn't find anything as such.
Som V. Tambe
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Magnetic moment of an silver atom
Image from Sakurai, Modern quantum mechanics.
Question: Why $\partial_z(\mu\cdot B)\simeq\mu_z \partial_z B_z$? it's because $\mu_z$ is constant with respect to the $z$-axis? thanks.
eraldcoil
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Value of the gyromagnetic ratio
The expression of the gyromagnetic ratio is given by-
$\gamma_e = \frac{ge}{2m_e}\\$
If I substitute the values of the constants $e$ and $m_e$, and take $g\sim2.022$, I get
$\gamma_e = 1.76 \times10^{11}$ [SI units]. The units should be $C…
rahman62
- 169
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How does QM explain the proton's magnetic moment?
I read that QM is baffled by the proton's angular momentum, I don't know if the issues are related, but do you know if and how it explains the odd value of the magnetic moment of the proton and of the neutron?
user337596