


Politecnico di Torino  
Anno Accademico 2012/13  
02KXWJM, 02KXWLI Physics II 

Corso di Laurea in Ingegneria Meccanica (Mechanical Engineering)  Torino Corso di Laurea in Ingegneria Dell'Autoveicolo (Automotive Engineering)  Torino 





Programma
The specific program for each course is available on the personal page of the didactic portal. The specific programs can present small differences for the different areas (Industrial Engineering, Civil Engineering, Information Technology Engineering, Management Engineering), and can show different deepening, elaborations and applications of the same fundamental subjects which are common to all Physics II courses.
The Physics II course explains the fundamental laws of classical electromagnetism, including the propagation of light considered as an electromagnetic wave. The objective of the course is the acquisition of the basic principles and of their physical meanings. The fundamental applications of each law are shown with the aim of providing the student with a method for the interpretation of the physical phenomena which are at the basis of many engineering problems. A good knowledge and mastery of the mathematical instruments learnt in the course of Mathematical Analysis I and II and of Geometry are required. Electrostatics in vacuum is treated in the Physics I course and must be known at the beginning of the Physics II course. This knowledge is fundamental for the comprehension of all the subjects that will be studied. ELECTROSTATICS Static electric field in matter: conductors. Capacitance and capacitors. Energy density of the electric field. Dielectric materials: electrical polarization. ELECTRIC CURRENT AND RESISTANCE Conduction. Current intensity and current density. Direct current (DC). Resistance. Ohm’s law. Resistivity and conductivity. Electric power. Joule effect. MAGNETOSTATICS Magnetic field and magnetic induction. Second Maxwell’s equation. Force on a charge moving in a magnetic field: Lorentz’s force. Magnetic force on a currentcarrying conductor. Sources of magnetic field. Field of a straight currentcarrying conductor: Laplace’s law, and its applications. Magnetic field of a circular current loop. Magnetic dipole. Torque on, and potential energy of, a magnetic dipole in a magnetic field. Forces between parallel currents. Ampère’s law and its applications. Magnetic fields in matter: diamagnetism, paramagnetism and ferromagnetism. TIMEDEPENDENT ELECTRIC AND MAGNETIC FIELDS Faraday – Henry – Lenz law of electromagnetic induction and its applications. Third Maxwell’s equation. Inductance and selfinductance. Energy in an RL circuit. Energy density of the magnetic field. AmpèreMaxwell law: fourth Maxwell’s equation. ELECTROMAGNETIC WAVES Wave equation for electric and magnetic field. General characteristics of a wave. Electromagnetic waves. Propagation and attenuation of the electromagnetic waves in conductors and dielectrics. GEOMETRIC OPTICS Snell’s law for refraction and reflection. Mirrors, refracting surfaces, thin lenses. WAVE OPTICS Interference, electromagnetic waves interference and its applications. Diffraction: the basic principles. Fraunhofer’s theory of a single slit diffraction. Polarization of light: the basic principles. 
Orario delle lezioni 
Statistiche superamento esami 
