C Physics - (5 cfu)

Prof. Mario Geddo Tel. 0382987503 - Fax. 0382987563
  E-mail. geddo@fisicavolta.unipv.it
 


Finalità

To stress and clarify the importance of the method of Physical Sciences and to help acquiring the knowledge of classic electromagnetic phenomena highlighting today applied physics resources.

Programma

Coulomb’s law and static electric fields
the electric charge and the matter; conducting and insulating materials
Coulomb’s law; static electric field E
comparison between electric and gravitational interactions
motion of charged particles in static electric fields

Gauss’s law
flux of the electric field
correlations between Gauss and Coulomb laws
E calculations by using Gauss’s law

electric potential
conservative fields and potential energy
the electric potential; electric potential calculations
electric fields and electric potentials;
constant potential surfaces and vector lines of the electric fields.
electrostatic properties of conducting materials

electrostatic energy
correlation between charge and electric potential
capacitors; capacity calculations; the concept of equivalent capacity
electric energy inside capacitors
energy density of an electric field
electrostatic properties of insulating materials (dielectric constant)

electric currents
electric current and density of electric current
charge flux and effective speed of carriers
resistance in conducting materials; Ohm’s law; conductance and specific resistance
temperature dependence of the specific resistance
microscopic aspect of the Ohm’s law (the Drude model)
non-ohmic materials: semiconductors and superconductors materials

energy balance in d.c. circuits
electromotive force
electric energy and electric power; energy balance
the concept of equivalent resistance; parallel and series configurations
The laws of d.c. circuits
Measurements of current intensity and of differences of electric potentials; RC circuits

static magnetic fields
introduction to magnetic interactions (see Mazzoldi p.227)
the magnetic field B; the magnetic force
Lorentz’s force; motion of charged particles in static electric and magnetic fields
Hall effect
Cyclotron
Magnetic forces on conducting wires and rings
magnetic dipole moment
potential energy of a conducting ring in magnetic field

origin of the magnetic interaction
interactions between magnets and conducting rings
magnetic field due to a charges flux
The Biot-Savart’s law
Interactions between parallel conducting electric wires;
Electromagnetic gun
The Ampere’s law and magnetic field calculations

Faraday’s law
induced electric currents: Faraday’s law; Lenz’s law
e.m. induction and energy exchanges
induced electric fields
inductance; magnetic flux and induced current
self induced electromotive force;
RL circuits; magnetic energy density

magnetic fields inside the matter
calamite
the magnetic flux and the Gauss’s law for magnetic fields
terrestrial magnetic field
magnetic fields inside the matter; magnetism and electrons
magnetic materials: dia- para- and ferro-magnetic materials
induced magnetic fields; displacement current
Maxwell’s equations

time-dependent electromagnetic fields
LC oscillations and damping
a.c. currents
forced oscillations e resonance
RLC (series) circuits
electric power in a.c. circuits; transformers

electromagnetic waves
waves (see Mazzoldi p. 465)
the spectrum of e.m. waves;
wave motion
energy transfer; Poynting’s vector
radiation pressure

nature of light and propagation rules
polarization;
reflection and refraction;
chromatic dispersion
total reflection;
Brewster’s law

wave like behaviour of light and energy balance
energy preservation in light reflection and refraction (see Mazzoldi p. 578);
Lambert ‘s law on wave intensity attenuation (see Mazzoldi p. 544)
interference;
diffraction;
Young’s experiment; coherence
Interference phenomena from thin layers

Attività d'esercitazione

Joint exercises in class (45%) and individual tests (5%) (in itinere) directed to solve and clarify problems and questions accurately selected among the most suitable to verify correct learning of lectures (50%).

Modalità d'esame

With “in itinere” positive results votation will be assigned at the of semester and recorded within January. Otherwise the assessment method consists of a selective written exam and (when required by the examining staff) an oral discussion.

Propedeuticità

PHYSICS A-B

Testi consigliati

Halliday, Resnick, Walker "Fondamenti di FISICA" (El-Magn-Ottica) V edizione, Casa Editrice Ambrosiana, Milano.
Mazzoldi, Nigro, Voci "FISICA" Vol. II, EdiSES, Napoli.


Ultimo aggiornamento: 07-12-2005


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