All Questions
6
questions
1
vote
1
answer
65
views
Potential energy of a permanent magnet
A friend and I had a discussion about the potential energy of a permanent magnet, and we want to find out which of our views is right, but we can't seem to find information to confirm/disprove either ...
- 11
3
votes
2
answers
636
views
How can we define Magnetic Potential Energy if it is non-conservative?
I recently learnt that for a circular wire carrying electric current or for a magnetic dipole, if it is kept in a uniform magnetic field, we can define its magnetic potential energy. This would mean ...
- 301
2
votes
1
answer
409
views
What is doing the work on a magnetic dipole in a magnetic field?
I understand that the torque acting on a magnetic dipole in a magnetic field is given by $$\vec\tau=\vec\mu\times\vec B \therefore \tau = \mu B sin\phi$$ It follows that the work done as the dipole ...
- 155
1
vote
2
answers
534
views
Source of magnetic dipole potential energy
One of the basic expression that goes without much thinking is the potential energy expression of a magnetic dipole in a magnetic field, $$ U = -\mu\cdot B $$
In the case of electric and gravitational ...
5
votes
1
answer
1k
views
Can someone explain how magnetic potential energy can exist even though the field is non-conservative?
$U=-B\cdot \mu$ is defined to be the magnetic potential energy, I saw this in my lecture notes, but we had already talked about the fact that since the work done to move a charge there is path ...
- 1,525
4
votes
3
answers
2k
views
Is there energy stored when iron is magnetized?
When a piece of iron is magnetized, and the domains are aligned,
Is there energy stored? If so, how much energy is stored?
If there is an attraction between that same iron and the source of the ...
- 677