Terms Relating to Magnetism

Magnetism:

• Magnetism is the ability to attract materials such as iron and steel.
• These are called magnetic material.
• Magnetism is a force that can act at a distance without contact, much li gravity
• This type of force is referred to as a field
  

Magnet:

• A magnet has a property of magnetism
• Its two opposite end or sides are called North and South Poles
• When two magnets are brought close to each other, like poles repel each other, and unlike poles attract each other with a magnetic force
• A permanent magnet from external magnetic forces
  
  

Magnetic Field: 

• A magnetic field is the area around a magnet in which magnetic force is present
  
  

Magnetic Materials:

• Magnetic materials are attracted or repelled by a magnet and can be magnetized themselves
  
  

Ferromagnetic Material:

• Is a name given to any material that behaves like iron in a magnetic field
  
  

Electro Magnetism:

• Is magnetism that is caused by toe flow of an electric current.
• This type pf magnetism diminishes when the current flow stops
  
  

Lines of Force:

• This magnetic field is made up of lines of force.
• These lines of force or also referred to as magnetic flux
  
  

Flux density:

• The stronger the magnetic force, the more lines of force per given area
• The Flux density of the magnetic field is a measure of the number of lines of force per unit area
  
  

Magnetic Screens:

• Magnetic line of force will pass through anything
• Therefore, you cannot block them
• Instead you create devises that deflect the lines of force, causing them to pass around objects. 
• These deflecting devices are referred to as magnetic screens, or shields
  
  

Residual Magnetism:

• The ability of a material to hold a magnetic field
  
  
  

Residual Magnetism:

• The ability of a material to hold a magnetic field
  
  
  
  
  

  Flux: Magnetic Lines of Force
  Flux will flow through anything
  Soft Iron is a good flux conductor