Polarized Free Electrons vs Polarity of Static Magnet

Join the discussion
Registration is free. Start your own thread to ask a follow-up.
2 replies · 3K views
Buckeye
Messages
164
Reaction score
2
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?
 
Physics news on Phys.org
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?