lesson 1 - magnetism Flashcards
1
Q
what are the only materials magnets can attract?
A
cobalt, nickel, iron.
2
Q
what is the other material they can attract because it is 98% iron?
A
steel
3
Q
where does the force act?
A
north and south pole
4
Q
what happens when the force is further from the magnet?
A
it weakens
5
Q
materials like steel contain regions called?
A
domains
6
Q
what do domains act like?
A
tiny magnets
7
Q
domains are … aligned
A
randomly
8
Q
what will a freely suspended magnet align itself with?
A
earths magnetic north pole.
9
Q
what does a compass align itself with?
A
earths magnetic field.
10
Q
what is the earths magnetic field due to?
A
movement of liquid iron and nickel.
