Magnetism

Question 1

What is the Science behind magnetism?

Answer 1

• A spinning electron creates a magnetic field called a dipole that contains both a north and a South Pole.
• When the majority of electrons spin in the same direction, the material has the potential to be magnetised.
• If the material does not have a large portion of electrons spinning in the same direction, then it has less potential to be magnetised because oppositely spinning electrons neutralise each other individual magnetic fields.

Question 2

Types of magnets (3)

Answer 2

• Permanent.
• Temporary.
• Electromagnet.

Question 3

What are the Alternative classification of magnetic materials (2)

Answer 3

• Paramagnetic materials - weakly attracted to magnets

* Ferromagnetic materials - strongly attracted to magnets

Question 4

Are alloys magnetic?

Answer 4

•Alloys are only magnetic if they contain a decent amount of a magnetic material

For example an alloy with iron would be magnetic

Question 5

Name some paramagnetic materials

Answer 5

• Platinum
• Aluminium
• Tungsten
• Molybdenum
• Lithium
• Magnesium
• Sodium
• Uranium

Question 6

Name some ferromagnetic materials

Answer 6

• Iron
• Nickel
• Cobalt
• Steel
• Alinco