1 / 19

Electromagnetic Field And Waves (EMFW) Lecture 1: Introduction and Motivation 17 Feb 2013

Electromagnetic Field And Waves (EMFW) Lecture 1: Introduction and Motivation 17 Feb 2013. By: Chandra Thapa Mail ID1: chandra2thapa@gmail.com Mail ID2: chandrat@nec.edu.np Web: http://nec.edu.np/faculty/chandrat/. Michael Faraday: 1791 - 1867. James Clerk Maxwell: 1831-1879.

oihane
Télécharger la présentation

Electromagnetic Field And Waves (EMFW) Lecture 1: Introduction and Motivation 17 Feb 2013

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electromagnetic Field And Waves (EMFW)Lecture 1: Introduction and Motivation17 Feb 2013 By: Chandra Thapa Mail ID1: chandra2thapa@gmail.com Mail ID2: chandrat@nec.edu.np Web: http://nec.edu.np/faculty/chandrat/

  2. Michael Faraday: 1791 - 1867

  3. James Clerk Maxwell: 1831-1879

  4. André-Marie Ampere:1775-1836

  5. Carl Friedrich Gauss: 1777-1855

  6. Any guess about Electromagnetics?? • Google  ??? • Bing ?? • Yahoo search ?? • संगै बसेको साथी?

  7. I found like this  (बिधार्थी हुदा )

  8. I found like this  (NOW)

  9. Electromagnetics subject??? • Hard to understand? • Hard to learn? • Long syllabus? • Many students failed? • Low score? • What else????????????  गाह्रो त छ |

  10. How does this subject look like?? • Physics? • Mathematics? • Engineering subject?

  11. Syllabus • Coulomb’s Law and Electric field intensity • Electric Flux Density and Gauss Law • Divergence • Energy and Potential • Electrostatic Field in material media • Boundary value problem in electrostatics • Current and current density • Magnetostatic • Curl • Magnetic Force and Material Media • Time varying force and material media • Wave Equation • Transmission Lines • Wave Guides

  12. Boring Part  Question pattern?? • Theory + Problems (Numerical)

  13. Happy Part  Knowledge • It’s really cool  • Wide application

  14. Subject matter flow • Electrostatic (Charges at rest, no magnetic field) • Magnetostatic (Magnet at rest, Current constant, no electric field) • Electromagnetics Wave (Time varying case, both electric field and magnetic field are present) • Transmission lines

  15. Prerequisite • Co-ordinate systems • Cross product, Dot product, Vector, Scalar • Derivative • Integration • Gradient • Divergence • Curl Math is problem solving tool!

  16. References • My Notes • पासा को पसल को फोटो कापी नोट What I prefer?? • Principles of Electromagnetics (Fourth Edition) by Matthew N.O. Sadiku • Bad news   Not available at NEC Library • Happy news   I can give you soft copy • Engineering Electromagnetics by William H. Hayt, JR (available at NEC library Run fast and get one  reserve one copy for you ;) ) • MIT, Standford Universities, IITs online video lectures (YouTube) Any other? स्थानीय लेखक ,भारतीय लेखक का किताबहरु (I don’t prefer)

  17. Some questions? • How does the region above the volcano become electrified and is there any way to tell whether the sparks travel up from the crater or down to it? Clue: Electric field • How wide is a lightning strike? Since a strike can be seen from kilometers away, is it as wide as, say, a car? Clue: Gauss’ Law • During ventricular fibrillation, a common type of heart attack, the chambers of the heart fail to pump blood because their muscle fibers randomly contract and relax. To save a victim of ventricular fibrillation, the heart muscle must be shocked to reestablish its normal rhythm. For that, 20A of current must be sent through the chest cavity to transfer 200 J of electrical energy in about 2ms. This requires about 100kW of electric power. Such a requirement may easily be met in a hospital, but not by say the electrical system of an ambulance arriving to help the victim. What, then, can power needed for defibrillation at remote4 locations. Clue: Capacitance

  18. Applications • Antenna (Design) • Motors • Magnetic Resonance Imaging (MRI) • Generators • Study of EM waves • High speed trains (Maglev-magnetic levitation) JR-Maglev at Yamanashi, Japan test track in November 2005

  19. Student Activities • Project Work (I will assign topic, student have to make report and present it in class) • Tutorials • Class Exams

More Related