# Electromagnetism

• Cours (CM) 24h
• Cours intégrés (CI) -
• Travaux dirigés (TD) 24h
• Travaux pratiques (TP) -
• Travail étudiant (TE) 24h

Langue de l'enseignement : Anglais

## Description du contenu de l'enseignement

1. Review on Electrostatics
Charges-coulomb law forces and fields. Superposition. Approach with fields lines and geometry.
Electric fields created by discrete and continuous charges distribution. Calculation of fields created by geometric shapes (charged wire, plane, sphere…).Electrostatic potential and energy- Gauss theorem.
2. Magnetostatics
Biot and Savart law. Magnetic field created by geometric shapes (wire, loop ….of current). Magnetostatic energy. Vector potential. Ampere theorem. Helmoltz coils. Laplace force
3. Induction
Lorentz induction: constant magnetic field and moving electric circuit. Laplace force
Neumann induction: rigid circuit and time-dependent magnetic field. Lenz law. Self –induction.
Illustrations with DC Motor/Generator; Synchronous motor; loudspeaker…
4.Maxwell Equations
Fields and sources. Limit cases and connexion with previous topics: electrostatics; magnetostatics, general induction. D’Alembert wave equation in the vacuum.
Consequences: charge conservation; Poynting vector and energy conservation.
5. Dielectric media and applications
Bounded charge density and volumic polarization. Dielectric susceptibility (scalar).
Wave equation in dielectrics (definition of optical index !!)
Microscopical approach- frequency dependence-dispersion and absorption (to be seen as dispersion by a prism for instance).
6. Conducting media and applications
Free charge- Ohm law- wave equation in metals (diffusion and skin effect). Microscopical approach (plasma model).
Skywaves in ionosphere
7. Notions on semi-conductors.

## Compétences à acquérir

At the end of the course the students will be able to understand: i) the principle of the electromechanical conversion; ii) the manipulation of the plane wave formalism; iii) the basis required for the supplementary lecture on applied electromagnetism

## Bibliographie, lectures recommandées

The Feynman Lectures on Physics, Vol. II: The New Millennium Edition: Mainly Electromagnetism and Matter;
Authors: R. P. Feynmann, R. B. Leighton, M. Sands;
Editor: Basic Books (2011); ISBN-10 : 0465024947 / ISBN-13 : 978-0465024940; 592 pages

## Pré-requis obligatoires

Basic electricty and the following dipole: capacitor, coil
Wave phenomena

## Contact

Faculté de Physique et Ingénierie

3-5 RUE DE L'UNIVERSITE
67000 STRASBOURG

Formulaire de contact

### Responsable

Yannick Hinschberger

### Intervenants

Ali Huseyn Dovlatov

Yannick Hinschberger

Gulyaz Najafova