Lecture Outline: Magnetism and Electromagnetism

  1. Background
    1. Early discoveries
    2. Later discoveries
  2. Fundamental laws, rules & terms to describe magnetism
    1. Lines of Force (rules)
    2. Permanent Magnets
  3. Elemental magnetism
    1. Direction of current field around conductors
    2. Left-Hand rule
    3. Force between parallel conductors
      1. Multi-turn coil field
      2. Polarity, Left-hand rule
    4. Factors influencing the field strength

    Force equals Pole 1 strength times pole 2 strength divided by d squared

  4. Important magnetic units, terms, symbols, and formals
    1. Basic Magnetic unit
    2. Relationship between B, H & Permeability factor                                                                    

      mmf equals NI

       

      H equals AT divided by meter

  5. Practical considerations toward core materials
  6. The B-H curve
  7. The hysteresis loop
  8. Induction and related effects
    1. Motor action
    2. Generator action
  9. Faraday’s law     

    V sub ind equals delta phi over delta tau

  10. Lenz’s law and reciprocal effects of motors and generators
    1. Lenz’s law
    2. Motor effect in a generator
    3. Generator effect in a motor
  11. Practical applications of magnetism
    1. Magnetic storage media
    2. Industrial components and devices
  12. Magnetism, related topics
    1. Toroidal Coil
    2. Magnetic shield   (Faraday Shield)
    3. Shaping fields
    4. Hall Effect
    5. Material Classifications