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Results tagged with geomagnetism
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user 6974
Geomagnetism covers questions related to the Earth’s magnetic field, its origin, history and measurement. Use electromagnetism for more general questions on magnetism.
16
votes
Accepted
Is there a difference in Earth's magnetic field between day and night?
It looks like there is some difference between day and night geomagnetic field, and one of the causes is mentioned in @JEB's comment.
Yamazaki Earth, Planets and Space (2022) 74:99
The Earth’s upper …
- 27.5k
3
votes
Why doesn't the Earth's magnetic field affect electronics?
Actually, the Earth's magnetic field does affect electronics, probably, in a positive way, as it protects it from the effects of cosmic rays.
- 27.5k
2
votes
Is it possible to use forces on a current carrying conductor due to Earth's Magnetic field t...
Let us consider a thin circular aluminum wire in the Earth's equator plane at the altitude, say, 150 km, i.e., beyond atmosphere, so cooling is not an impossible problem. Aluminum is superconducting b …
- 27.5k
1
vote
Variations of earth's magnetic field strength
You ask a lot of questions, I'll try to answer just one. As the Earth's magnetic field protects us from ionizing radiation, theoretically, there can be negative correlation between the Earth's magneti …
- 27.5k
1
vote
Need help in finding error in calculation to find Earth's magnetic field strength using Galv...
Maybe magnetic field at the point where you measured it included some local magnetic field, say, from some metal structure.
- 27.5k
1
vote
How can a refrigerator magnet be stronger than the Earth's magnetic field?
As @Árpád Szendrei noted, "Your experiment would have a different result if you tried it very close to the liquid core"
Indirect estimate of magnetic field inside the Earth gives a value of 2.5 mT (Na …
- 27.5k
1
vote
A strong neodymium magnet has no effect whatsoever on my phone compass. How is that possible?
iPhone has a Hall effect/magnetometer, not a magnet (https://theoryandpractice.citizenscienceassociation.org/articles/10.5334/cstp.158/) - you can look up the model Alps Electric HSCDTD007
- 27.5k
0
votes
Could I make a magnetic foam or film by mixing magnetic dust?
I think ferromagnetic dust (or filings) with some adhesive should work. If the resulting mix has zero average magnetization, you should be able to magnetize it using an external magnet. Beware of the …
- 27.5k
0
votes
is there any possible way of creating a miniature version of earth's magnetic field?
To defend the spacecraft from cosmic radiation, one could consider strong (superconducting) electromagnets, but I am not sure they can provide adequate defense. As for the question in the title, it lo …
- 27.5k
-1
votes
Why does earth's magnetic field change its direction?
It is guessed that those flips are caused by instabilities of the dynamics of the Earth's core:
"Scientists believe Earth's magnetic field is generated deep inside
our planet. There, the heat of the …
- 27.5k