Polarized Free Electrons vs Polarity of Static Magnet

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SUMMARY

The discussion centers on the behavior of free polarized electrons in relation to the poles of a static magnet. Specifically, it addresses which type of free polarized electron, either spin up or spin down, is attracted to the true North pole of a static magnet. It is established that electrons possess a magnetic dipole moment, and while they experience torque in a uniform magnetic field, there is no net force acting on them. The alignment of the electron's dipole moment with the external magnetic field lowers energy, but the movement of the dipole does not affect energy levels.

PREREQUISITES
  • Understanding of electron spin and magnetic dipole moments
  • Knowledge of static magnetic fields and their properties
  • Familiarity with torque and force concepts in physics
  • Basic principles of energy minimization in magnetic systems
NEXT STEPS
  • Research the relationship between electron spin and magnetic fields
  • Study the principles of magnetic dipole moments in quantum mechanics
  • Explore the effects of torque on charged particles in magnetic fields
  • Learn about energy states and alignment in magnetic systems
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Physicists, students of quantum mechanics, and anyone interested in the interactions between charged particles and magnetic fields will benefit from this discussion.

Buckeye
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Question 1:
Which type of free polarized electron (spin up or down) is attracted to the true North pole of a static magnet?

Question 2:
Why is a free electron attracted to or repelled by either pole of a static magnet?
 
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Buckeye said:
Which type of free polarized electron (spin up or down) is attracted to the true North pole of a static magnet?
In a uniform magnetic field, there is just a torque on electrons, no net force.

Electrons have a magnetic dipole moment. The energy is lowered by aligning with an external field, but moving the dipole around does not change the energy.
 
Not a Course Question: Still need help to understand

Pieter Kuiper said:
In a uniform magnetic field, there is just a torque on electrons, no net force.
Electrons have a magnetic dipole moment. The energy is lowered by aligning with an external field, but moving the dipole around does not change the energy.

In spite of the change of venue, the question stands. In simple terms, ignoring the torque and the tendency to least energy, which spin goes to which pole?
 

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