Lec3&4-CoulombField

Lec3&4-CoulombField - ECSE 351 Electromagnetic...

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ECSE 351 Electromagnetic Fields McGill University – ECE Dept. - Prof. Milica Popovi ć Lectures 3&4: Coulomb’s Law and Electric Field Intensity Objective: law and calculation of electric field intensity for fundamental structures Drill problems given throughout the text – highly recommended! The CD (back of the book) offers illustrations and quizzes.
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A note on progress of material… Maxwell’s equations give a complete description of electromagnetic fields and waves, in time and space, and including different materials. We currently start with two important assumptions: 1. Fields do NOT change in time = static 2. We are observing problems in free space, vacuum. Only charge distribution is present in this vacuum – but no dielectric or magnetic materials. McGill – ECE – ECSE 351 Electromagnetic Fields – Prof. M. Popovic
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How and when did it all begin? Thales of Miletus (600 B.C) observed separation and attraction of electric charges. In the same geographical area, the phenomenon of magnetism was noticed with the magnetic ore. ECSE 351 Electromagnetic Fields Prof. Milica Popovi ć
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The story continues 22 centuries later… William Gilbert (1540-1603) repeated the experiments and coined the word “electron” Benjamin Franklin (1706-1790) introduced terms “positive” and “negative” for electric charges ECSE 351 Electromagnetic Fields Prof. Milica Popovi ć
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force between two charged bodies McGill – ECE – ECSE 351 Electromagnetic Fields – Prof. M. Popovic Charles Augustin de Coulomb (1736 – 1806) Dielectric constant or
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Lec3&4-CoulombField - ECSE 351 Electromagnetic...

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