Permanent Magnetic Principles

Question 1

What is the two forms of Magnets?

Answer 1

Permanent magnets & Electromagnet

Question 2

What is a permanent Magnet?

Answer 2

Permanent magnets are materials where the magnetic field is generated by the internal structure of the material itself.

Question 3

What are Electromagnets?

Answer 3

temporary magnets which are created when current flows through a coil of wire.

Question 4

What is Magnetic flux?

Answer 4

a force of attraction or repulsion between magnetic materials carried by invisible magnetic field lines called magnetic ‘flux’ that surrounds all magnets.

Question 5

Name the properties of magnetic flux:

Answer 5

• Completely closed curves
• Definite direction – North to South
• May be distorted or bent to any shape (by other magnetic fields), but they never cross each other.
• Perfectly elastic
• Can extend to any length, or contract and vanish when the magnetising force is removed
• Pass unaffected through any non-magnetic substance

Question 6

What is the magnetic field pattern?

Answer 6

Direction of magneti flux from North to South

Question 7

What is the magnetic field patern of a bar magnet?

Answer 7

Question 8

What is the magnetic field pattern for a Horseshoe magnet

Answer 8

Question 9

State the two laws of magnetism in regards to like and unlike poles of magnets:

Answer 9

Like poles repeal & unlike poles attract

North pole + North pole = repeal

South pole + South pole = repeal

South pole + North Pole = attract