3.12 Permanent & Induced Magnets Flashcards
1
Q
What are the two different categories of magnets?
A
Permanent & Induced
2
Q
What is a magnet?
A
Any object that produces a magnetic field
3
Q
What is a magnetic material?
A
Any object that can be influenced by magnetic fields, and has the potential to become a magnet
4
Q
What are four examples of magnetic materials?
A
- Nickel
- Cobalt
- Iron
- Steel
5
Q
What are permanent magnets?
A
Magnets that produce their own magnetic field all the time
6
Q
What are induced magnets?
A
- Induced magnets are magnetic materials that turn into a magnet when they’re put into a magnetic field.
- When you take away the magnetic field, induced magnets quickly return to normal and stop producing a magnetic field (they lose their magnetisation)
7
Q
What is always the force between a permanent and induced magnet?
A
Attractive
8
Q
What is meant by magnetically soft materials?
A
Magnetic materials that lose their magnetism really quickly
9
Q
What are two examples of magnetically soft materials?
A
Nickel and iron
10
Q
What is an example of a magnetically hard material?
A
Steel
