Re: Magnet question


FiNOH wrote:
Where does a magnet get its power?

There is energy stored in the magnetic field around a permanent
magnet.

That energy DOES run out at high temperature, the so-called 'Curie
temperature'
named after Monsieur Pierre Curie, but at low temperatures there is a
quantum effect,
sometimes called 'exchange force', sometimes called 'Hund's rule', that
favors aligned electron magnetic moments.

So, the energy in the magnetic field is stuck, and doesn't run out,
except in nonmagnetic
materials and at high temperatures in magnetic materials. Some heat
disappears when
the magnetic material becomes magnetized on chilling below the Curie
temperature, which
provides the stored energy.

.

Relevant Pages

  • Re: OT only if you dont construct
    ... end that fits into the iron This metal has a well defined Curie point ... The sensor has a magnet that slides in the tube against a spring. ... closes the switch to the element. ... So to change the tip temperature you need to select a bit with a different ...
    (uk.radio.amateur)
  • Re: OT only if you dont construct
    ... the end that fits into the iron This metal has a well defined Curie point ... The sensor has a magnet that slides in the tube against a spring. ... and closes the switch to the element. ... So to change the tip temperature you need to select a bit with a different ...
    (uk.radio.amateur)
  • Re: Weller WTCPT tip not hot enough
    ... The Weller WTCPT has no controls or adjustments. ... At low temperatures, the magnet holds a piston, which pulls ... When the tip temperature reaches the curie point, ...
    (sci.electronics.repair)
  • Re: Is charge conserved between frames?
    ... slide the magnet through the centre along the ... In the frame of the lathe, the bar magnet held in the chuck has been centred ... > As I said, momentum divides equally, but kinetic energy doesn't. ... other bullet, now clamped firmly in a vise, 2v) at u+v. ...
    (sci.physics.relativity)
  • Re: Coulomb and Lorentz Gauge
    ... :>: phrase that matter hates EM energy but loves other matter? ... deflected by the moving field, then the moving field exerted a force ... cause a magnet to move, whether the magnet is present of not. ... We can use the particle with mass, be it electron or magnetized ...
    (sci.physics.relativity)