Magnetism Flashcards
1
Q
What is magnetic induction?
A
When a magnetic material becomes a magnet itself
2
Q
What is soft magnetism?
A
When a material is easy to magnetise but loses its magnetism easily too
3
Q
What is hard magnetism?
A
When a material is hard to magnetise, but keeps its magnetism
4
Q
What are the four magnetic materials?
A
Iron, steel, nickel & cobalt
5
Q
How can you induce magnetism? (3)
A
- Stroke object with a magnet
- Pass an electric current through it
- Put object in a strong magnetic field
6
Q
How can you demagnetise something?
A
- Drop object
* Put in a reverse magnetic field
7
Q
What is a domain in a magnetic material?
A
A region in the material where all the electrons are spinning in the same direction so all of their fields add up
8
Q
What is a magnetic field?
A
A region where magnetic materials experience a force
9
Q
Which way do magnetic field lines point?
A
North to south
