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## GENERAL PHYSICS

CODE 57194 2021/2022 8 cfu during the 2nd year of 8765 SCIENZA DEI MATERIALI (L-30) - GENOVA FIS/01 Italian GENOVA 1° Semester This unit is a module of: AULAWEB

## AIMS AND CONTENT

### AIMS AND LEARNING OUTCOMES

The module aims to provide the fundamental concepts of electromagnetism in vacuum and a first introduction to electromagnetic waves.
At the end of the module, the student will be able to i) understand the origin of electric and magnetic fields and know their properties; ii) extend the concepts acquired in mechanics to situations involving forces and energies of an electromagnetic nature; iii) solve simple exercises on electric and magnetic fields and direct current circuits; iv) describe the properties of a plane electromagnetic wave.

### TEACHING METHODS

Traditional lectures; exercises solved by the lecturer with the student participation; laboratory experiments performed by the students in the presence of the teacher, with experiment tracks provided in advance.

Classroom hours: 68
Hours employed in laboratory experiments or other activities: 6

### SYLLABUS/CONTENT

Lectures:

Electric charge and electric field

Electric charge. Conductors and insulators. Coulomb’s law. The electric field. Gauss’ law. Electric potential. Capacitance and capacitors. Energy stored in a charged capacitor.

Electric current

Current density. Resistance and resistivity. Ohm’s law. Electric circuits. Kirchhoff's laws. Power in electric circuits. RC circuits.

Magnetic field

Lorentz force. Magnetic force on a current-carrying wire. Biot-Savart law. Force between two parallel currents. Ampère’s law. Magnetic flux. Faraday-Neumann-Lenz’s law. Induced electric field. Inductance. Self-induction. RL circuits. Energy stored in a magnetic field.

Maxwell equations and electromagnetic waves

Ampère-Maxwell’s law. Displacement current. Maxwell’s equations in integral and differential form. Electromagnetic wave equation. Electromagnetic plane waves.

Laboratory experiments:

DC circuits (Series and parallel connection of resistors; measurement of ohmic and non-ohmic I-V characteristics)

RC circuits, measurement of the time constant.

D. Halliday, R. Resnick, J. Walker - Fundamentals of Physics, 10th edition, vol.2 - Wiley

Slides and exercises uploaded in Aulaweb

## TEACHERS AND EXAM BOARD

### Exam Board

ANNALISA RELINI (President)

LUCA VATTUONE

MARINA PUTTI (President Substitute)

## LESSONS

### LESSONS START

This information is available at https://servizionline.unige.it/unige/stampa_manifesto/MF/2021/8765.html

### Class schedule

All class schedules are posted on the EasyAcademy portal.

## EXAMS

### EXAM DESCRIPTION

The exam includes a written test and an oral test.

The written test consists in solving exercises on the topics covered in the 3rd module. It can be carried out separately, as a partial test, or at the same time as the written test of the 4th module, as a final written test on the overall program.

Students who have received a grade of at least 15/30 in each of the partial tests or in the overall written test are admitted to the oral test.

The oral test is carried out together with that of the 4th module and consists in the discussion of the written test(s) plus two questions on the topics of the course, one for each module. In case that more in-depth analysis is required, the number of questions may be increased, either to achieve an excellent mark, or to reach the level required to pass the exam.

### ASSESSMENT METHODS

The written test will evaluate the ability to: i) interpret the text of the proposed exercise and outline the problem; ii) identify the physical laws involved and the related equations to be applied; iii) quantitatively solve the exercise; iv) assess whether the numerical result obtained makes sense.

To evaluate the written test, the following parameters will be taken into account: the correct setting of the solution of the exercise, the correctness of the literal solution obtained, the congruence of the numerical solution obtained.

The oral exam will ascertain the ability to: i) present the requested topic with language properties; ii) describe simple applications of the physical laws under consideration.

To evaluate the oral exam, the following parameters will be taken into account: the level of understanding of the topic, the quality of the presentation, the correct use of technical terminology, the capacity for critical reasoning.

### Exam schedule

Date Time Location Type Notes
14/01/2022 09:00 GENOVA Scritto + Orale
16/02/2022 09:00 GENOVA Scritto + Orale
15/06/2022 09:00 GENOVA Scritto + Orale
13/07/2022 09:00 GENOVA Scritto + Orale
09/09/2022 09:00 GENOVA Scritto + Orale