All Questions
39
questions
0
votes
1
answer
178
views
Units of Pauli spin magnetization and Fermi energy of free electron gas
I cannot get the correct units for the magnetic susceptibility and the Fermi energy for a free electron gas!
According to "Introduction to Solid State Physics", 8th edition by Charles Kittel,...
- 45
2
votes
2
answers
223
views
Is a moving electret considered a current, and would spinning one make a magnet?
If I establish a permanent electric charge on some volume of material (as in an electret) and then move that material through space — is that motion equivalent to a current in a wire?
Also, since a ...
- 370
0
votes
1
answer
244
views
Electron in varying magnetic field
Lets consider an electron that is placed in an existing, constant in space near the electron, magnetic field. Electron is stationary. Magnetic field over time gradually reduces to zero.
I assume ...
- 1,116
0
votes
2
answers
55
views
Why does a moving charge experience force with a bar magent unlike getting attracted or repelling to it like two bar magnets would do?
i wanted to know why does a moving charge and bar magnet not experience force similar to how two bar magnets experience since they both have magnetic fields. In bar magnets they attract or repel but ...
1
vote
2
answers
101
views
Would somebody feel a magnetic field if they are travelling at the same velocity as a charge?
I am little bit curious about how magnetic fields are being generated when a charge moves.
I want to check if somebody travelling along with a charged particle, would that person experience a magnetic ...
- 21
1
vote
0
answers
20
views
What is the atomic explanation for why some materials cannot be magnetized? [duplicate]
I have heard many variations on the explanation for why certain materials like iron can be magnetized by being stroked with a magnet, but I haven't yet found any source directly explaining why some ...
- 115
1
vote
4
answers
123
views
Electrons, magnetism and electromagnetic waves
I know that moving charge (such as electrons moving around nuclei) produces a magnetic field. I also know that moving charge (again, such as electrons in atoms) can produce electromagnetic waves, ...
- 115
1
vote
0
answers
136
views
Why and how exactly do spinning electrons create a magnetic field?
I have just been told that if you had a spinning electron completely isolated, even that one electron would have a magnetic north and south pole. I have also been told that all metals have spinning ...
- 115
0
votes
1
answer
33
views
How do magnetic fields due to random motions of charges cancel out in a current-carrying wire?
In my physics textbook, it states that
magnetic fields due to random motions of charges cancel out at every point
I know there's a drift velocity due to force imposed by the electric field, but the ...
- 81
0
votes
2
answers
1k
views
What direction is current for an electron in both $E$ and $B$ fields?
According to Fleming's left hand rule:
I am a bit confused however in the case of an electron travelling in a region of both electric and magnetic fields, which direction would the electric current ...
- 167
0
votes
2
answers
349
views
Solenoid and induced electric fields
Let us suppose there is a solenoid which has $n$ turns per unit length the current is varying with time as $I =kt$ where k is a constant if the current is flowing then there must be induced electric ...
- 163
0
votes
0
answers
46
views
Why doesn't the magnetic field make electrons escape out of the material?
If a conducting rod moves within a magnetic field, the electrons within it will move for a short amount of time to create a potential difference. When the current is created within this rod, the rod ...
- 1,235
0
votes
1
answer
66
views
Magnetic susceptibility of electron gas in non-uniform magnetic field?
Someone can explain briefly how to treat with perturbation theory a free electron gas in a sinusoidal external magnetic field ? I'm trying to understand the paramagnetic response of an electron gas to ...
- 1
4
votes
3
answers
2k
views
The motion of an electron accelerating in a uniform magnetic field
As far as I know, when electrons travel perpendicular to a uniform magnetic field, the Lorentz force makes the electron undergo circular motion. As this electron undergoes circular motion, it emits EM ...
- 471
1
vote
1
answer
456
views
Electrons in an Inductor
What basically happens to the electrons, does the magnetic field produced by the electron moving in the inductor affect itself. what are the forces involved? Please elucidate the mathematics.
The ...
- 455