Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Polarized Free Electrons vs Polarity of Static Magnet

  1. Dec 11, 2005 #1
    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?
  2. jcsd
  3. Dec 12, 2005 #2
    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.
  4. Dec 12, 2005 #3
    Not a Course Question: Still need help to understand

    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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook