Types of Magnetism (1)

Question 1

What and when are magnetic fields produced?

Answer 1

Produced by negatively charged electrons as they move through space.

Magnetic fields occur any time an electrical charge is in motion.

Question 2

Define Magnetic Moment

Answer 2

The strength of a magnetic field

Question 3

How does a net Magnetic Moment become zero?

Answer 3

If two electrons around the same nucleus are spinning in opposing directions pair together.

Question 4

Electrons occur in _____.

Answer 4

Pairs, paired electrons spin in opposite directions (net magnetic field of zero).

Question 5

Some materials with _____ electrons, have a net magnetic field which react more to external fields.

Answer 5

unpaired electrons.

Question 6

Three categories of magnetic materials:

Answer 6

• Paramagnetic
• Ferromagnetic
• Diamagnetic

Question 7

Paramagnetic

Answer 7

Materials have a minimal positive attraction to a magnet.

• when the external magnetic field is removed, the magnetic properties are not retained

Question 8

Ferromagnetic

Answer 8

Materials have a high attraction to a magnet.

• when the external magnetic field is removed, the magnetic properties are retained

Question 9

Diamagnetic

Answer 9

Materials have very weak, negative attraction to a magnet.

• Slightly repelled b y magnetic fields
• when the external magnetic field is removed, the magnetic properties are not retained

Question 10

Examples of Paramagnetic materials

Answer 10

• Platinum
• Aluminium
• Manganese

Question 11

Examples of Ferromagnetic materials

Answer 11

• Iron
• Nickel
• Cobalt