Portale di Ateneo - En.Unibs.it

Remark 1: The reported program is the full one. A smaller cut is enough for a sufficient examination (to be agreed with the lecturer).

Remark 2: Although practical applications are stressed on, the leading point remains seeing how fundamental principles work in them.

Flux and loop integrals, vector calculus.

Fluxes of charge, matter and energy. Electric current and sound intensity.

Gauss, Green-Stokes theorems (no demonstration), continuity equation.

Frequency spectrum: main ideas and features.

Coulomb-Lorentz force. Charge motion in simple electric and magnetic fields.

Theoretical principles of electromagnetism (following Maxwell's equations): Gauss' theorem, Conservativity of electric static fields, flux conservation for he magnetic field and for the electric field in vacuum, loop integral of the magnetic field, law of Faraday, Neumann and Lenz, displacement current.

Simple application of electrostatics, magnetostatics, Faraday, displacement current.

Capacity - parallel plate capacitor

Inductance - Inductors: solenoid and parallel tapes.

Wave guides. Detailed study of a parallel tape case, with model calculation of the wave equation.

Conduction of electric charge. Band structure, conductors, insulators, semiconductors (natural or doped p/n). Behavior at low and environment temperature. Holes. Ohm's and Joule's laws. Simple circuits with resistors.

Amplification devices. Regimes, vacuum tube, p/n junction, Mosfet transistor, integrated circuits. Handling of analogic and digital signals.

Alternating currents. Phasors, impedance. Connection of resistors, capacitors etc. Series and parallel LC. Filters.

Management, safety, and costs. Active and reactive power. Triphase power. Transformers. Generation-transmission-distribution scheme. Standard voltages and power. Earthing. Shock protection and safety in electrical systems.

Generator connctions, between them and to a network. Role of Lenz's law in syncronization.

Triphase machines. Coil in magnetic field. Syncronous and asyncronous engines and generators. Equality of mechanic and electric power.

Waves: general features in 1, 2, 3 dimensions. Amplitude and energy.

Interference. Detailed case of two oscillations or waves. Optical case. Stationary waves. Fermat. Light rays as an effect of constructive interference.

Reflection and transmission, role of the medium impedance.

Seismic waves. Definitions, scales, transport, resonance, focussing, overlap of probe and response spectra.