Magnetism (1) Flashcards
1
Q
Magnetic Moment
A
the spinning of an electron around its own vertical axis generating a tiny magnetic field around the electron - magnetic moment.
2
Q
Domain
A
A cluster of magnetic moments (electrons spinning in same direction) creating a domain.
3
Q
When magnetized, domains ____ themselves.
A
align themselves
4
Q
Magnetic fields travel on the “inside” of a bar magnet from ___ to ___. and on the exterior travel ___ to ___.
A
south to north
north to south
5
Q
Magnetic lines of force rules:
A
- never cross
- seek path of least resistance
- do not leave or enter the centre
- continuous loop
- parallel paths which tend to repel each-other
6
Q
Three basic magnetic material classifications:
A
ferromagnetic
paramagnetic
diamagnetic
7
Q
Ferromagnetic
A
- large positive attraction
- retain magnetic properties
- iron, cobalt, nickel
8
Q
Paramagnetic
A
- small positive attraction
- do not retain magnetic properties
- aluminium, platinum, oxygen, manganese
9
Q
Diamagnetic
A
- small negative attraction
- do not retain magnetic properties
- zinc, gold, copper, mercury
