All Questions
18
questions
0
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137
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Does Earth's electromagnetic field rotate with Earth?
I find sources saying that Earth's magnetic field rotates with Earth, but there are few sources saying that the electromagnetic field rotates with Earth. I realize the question may have a complicated ...
- 1
-1
votes
1
answer
125
views
Ideas for levitation using Earth's magnetic field and mu-metal [closed]
I'm not sure the idea works or not. Please answer it and its reason.
As shown in Figure 1, when the ASTM A753 Alloy2 magnetic shielding alloy is exposed to an external magnetic field, the applied ...
0
votes
1
answer
139
views
Earth electromagnetic field
Nowadays an unlimited amount of information can be transferred around the planet using wireless methods.
Is that possible to transfer the information using natural electromagnetic field such as Earth ...
- 1
0
votes
1
answer
395
views
Magnetic field in a Tangent Galvanometer
I was reading about the tangent galvanometer online. I came across a youtube video : https://www.youtube.com/watch?v=wIuAnP9xfxw .
It said that the field produced by the circular coil of the ...
2
votes
0
answers
20
views
Being the Earth modelized as a big magnet (or solenoid), which would be the field intensity of such a model inside the solenoid or magnet axis?
This question has arisen from the Carl Friedrich Gauss’ statement that the Earth could be modeled, concerning his calculations about the earth’s magnetic potential, as a big magnet, himself having ...
1
vote
5
answers
2k
views
Why does the Earth not lose its magnetism?
A magnet loses its magnetic properties when subjected to heat, the Earth's core is also hot but still it has magnetic properties, Why?
- 676
8
votes
3
answers
2k
views
How many amperes are flowing in the Earth's core?
To my surprise I couldn't find any estimate on how many amperes of electrical current are flowing in total in the Earth's core to be able to create the magnetic field strength $5\cdot 10^{-5}$ T on it'...
- 6,841
1
vote
2
answers
242
views
Energy Budget: Is the Earth's magnetic field slowly decaying?
Earth's magnetic field is maintained by the dynamo effect, and I have no doubt that this effect could sustain Earth's magnetic field for a very long ("infinite") time.
It's my understanding that the ...
- 225
2
votes
1
answer
468
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differences of Aurora Borealis (North) vs. Aurora Australis (South)
I was wondering about the differences between the Northern vs. Southern lights: will one pole collect the positive charges, and the other the negatives? I know that the solar wind is composed mainly ...
- 21
4
votes
6
answers
5k
views
Why geologist do not consider molten iron in the magma to be the source of Earth's magnetic field?
This was a question that came in a exam. How come is this possible?
Actually, a question on the source of Earth's magnetic field was asked here on physics SE, which matches my opinion.
The ...
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-3
votes
1
answer
845
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Could Earth's magnetic field be used to lift electromagnets? [closed]
This but lifted by the Earth's magnetic field.
- 21
1
vote
1
answer
181
views
Will my data drives be safe in an emp event? [closed]
If there was an emp event (maybe because the rotation of magnetism of the earth or an atomic bomb) would the data on my hard drives, ssd, dvd, mini dvi tapes and cassette tapes be safe?
- 47
1
vote
0
answers
37
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Earth's magnetic effect on my magnet
My magnet seems to work independently of, and unaffected by, the Earth's magnetic field, yet the magnetic field of my magnet changes as I introduce some other similar magnets of varied sizes into its ...
- 145
14
votes
2
answers
4k
views
Does the geomagnetic field rotate?
The Earth rotates about it's own axis. Do the geomagnetic field lines rotate due to this rotation or not?
- 347
6
votes
1
answer
15k
views
What is the effect of Earth’s magnetic field on airplanes?
As an airplane accelerates through the earth’s magnetic field, it experiences a changing flux $d\phi \over dt$ and a potential difference is induced along its wings.
Given that the wings are made of ...
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