Magnetic Attraction, Repulsion, and Shielding


Description:

The explanation of the concepts of magnetic fields and lines of force

Learning Outcome:

Upon the completion of this module, you will be able to:

  1. Define magnetic lines of force.
  2. Explain magnetic fields.
  3. Define magnetic flux.
  4. Calculate flux density.
  5. State the laws of magnetic attraction and repulsion.
  6. Explain how the earth's magnetic field works.
  7. Explain the term "magnetic shielding."
  8. Explain the term "electromagnetism."
  9. Explain the term "self inductance."
  10. Explain the term "mutual induction."
  11. Explain the term "electromotive force."

Topic 1: Magnetic Fields and Lines of Force

  • Topic Introduction and Objectives
  • Line of Direction of Magnetic Force
  • Magnetic Line of Force
  • Magnetic Fields and Magnetic Flux
  • Check-Point Question
  • Check-Point Question
  • Magnetic Field Around a Magnet
  • Topic Summary

Topic 2: Laws of Attraction and Repulsion

  • Topic Introduction and Objectives
  • First Two Laws of Magnetic Attraction and Repulsion
  • Flux Patterns
  • Third Law of Magnetic Attraction and Repulsion
  • Check-Point Question
  • Topic Summary

Topic 3: Earth's Magnetism

  • Topic Introduction and Objectives
  • Magnetic Polarities of Earth
  • Early Compass Users
  • Earth's Lines of Force
  • Angle of Variation
  • Check-Point Question
  • Topic Summary

Topic 4: Magnetic Shielding

  • Topic Introduction and Objectives
  • Insulator for Magnetic Flux?
  • Electric Instruments and Magnetic Shields
  • Check-Point Question
  • Topic Summary

Topic 5: Concepts in Magnetism

  • Topic Introduction and Objectives
  • Electromagnetism
  • Self Inductance
  • Mutual Induction
  • Counter Electromotive Force
  • Check-Point Question
  • Check-Point Question
  • Topic Summary
  • Assessment