Calculating Magnetic Field from Spin Alignment Energy Difference

In summary, magnetism is a force exerted by magnets on certain materials, caused by the movement of electrons. Magnets have two poles that attract and repel each other due to the alignment of electrons. Permanent magnets have a constant magnetic field while electromagnets can be turned on and off. Electrons contribute to magnetism through their spin and can be affected by magnetic fields, which is utilized in technologies like generators and motors.
  • #1
tigert2004
9
0
An electron is placed in a magnetic field B that is directed along a z axis. The energy difference between parallel and antiparallel alignments of the z component of the electron's spin magnetic moment with B is 4.50 10-25 J. What is the magnitude of B?

energy=Beh/4pim 4.5e-25 = B (1.6e-19)(6.626e-34)/ 4pi 9.109e-31

B=4.5e-25/9.27e-24

B=.0485 T
B =48.5 mT

But this seems to be wrong?
 
Physics news on Phys.org
  • #2
I have also tried -48.5mT but that is wrong also
 
  • #3
Is it because the problem is giving youthe energy difference between the two alignments?
 

FAQ: Calculating Magnetic Field from Spin Alignment Energy Difference

What is magnetism?

Magnetism is a phenomenon that results from the force exerted by magnets on certain materials, such as iron or nickel. It is caused by the movement of electrons, which have a magnetic field, in a specific direction.

How do magnets attract and repel each other?

Magnets have two poles, north and south, and opposite poles attract each other while like poles repel. This is due to the alignment of the electrons in the material, which creates a magnetic field that interacts with other magnetic fields.

What is the difference between a permanent magnet and an electromagnet?

A permanent magnet is one that has a constant magnetic field and does not require an external source of energy to maintain its magnetism. An electromagnet, on the other hand, is created by passing an electric current through a coil of wire and can be turned on and off.

How do electrons contribute to magnetism?

Electrons have a property called spin, which creates a tiny magnetic field around them. When electrons in a material are aligned in the same direction, their magnetic fields add up and create a larger magnetic field for the whole material.

Can magnetism affect electrons?

Yes, magnetism can affect the movement of electrons. When a magnetic field is applied to a material, it can cause the electrons to move in a specific direction, which can be utilized in technologies such as generators and motors.

Similar threads

B Quantum teleportation of usable information
Replies
19
Views
1K
Electron enters magnetic field at 5000V -- What's the radius?
Replies
14
Views
3K
Protons along a magnetic field line
Replies
1
Views
820
How Is Current Calculated in a Mass Spectrometer?
Replies
3
Views
1K
I Where does the energy come from?
Replies
21
Views
1K
I Potential energy of spin anti-alignment
Replies
14
Views
3K
I Precession of spin in a magnetic field
Replies
10
Views
3K
Energy of a magnetic dipole moment
Replies
1
Views
3K
Calculating Magnetic Field at Point P from a Short Current Element
Replies
5
Views
2K
Exploring the Energy Difference of a Hydrogen Atom in a Magnetic Field
Replies
18
Views
3K

Hot Threads

Recent Insights

Back
Top