LABORATORY OF MAGNETISM

Fisica LABORATORY OF MAGNETISM

0512600025
DEPARTMENT OF PHYSICS "E. R. CAIANIELLO"
EQF6
PHYSICS
2022/2023

YEAR OF COURSE 3
YEAR OF DIDACTIC SYSTEM 2017
SPRING SEMESTER
CFUHOURSACTIVITY
324LESSONS
336LAB
ExamDate
APPELLO DI FEBBRAIO 202315/02/2023 - 16:00
Objectives
KNOWLEDGE AND UNDERSTANDING:
THE COURSE INTENDS TO GIVE THE EXPERIMENTAL OPERATIVE COMPETENCES AND A GOOD KNOWLEDGE ON THE EXPERIMENTAL ANALYSIS OF THE PROPERTIES OF THE MAGNETIC FIELD, ON ITS INTERACTION WITH THE ELECTRICAL CURRENT, AND ON THE PHENOMENOLOGY RELATED TO THE MAGNETIC PROPERTIES OF THE MATTER.

APPLYING KNOWLEDGE AND UNDERSTANDING:
ONE OF THE MAIN GOALS IS TO MAKE THE STUDENT ABLE TO OPERATE WITH COMPETENCE IN A LABORATORY, TO DEVELOP THE SKILLS TO SOLVE PRACTICAL EXPERIMENTAL PROBLEMS, AND TO DESIGN AND REALIZE AUTONOMOUSLY SCIENTIFIC EXPERIMENTS FOR THE MEASUREMENT OF PHYSICAL QUANTITIES RELATED TO THE MAGNETIC PHENOMENA. MOREOVER THE COURSE WILL GIVE A CONTRIBUTION TO REFINE THE POWERS OF OBSERVATION OF THE MAGNETIC PHENOMENA, ALSO IN THE EVERYDAY LIFE. IN PARTICULAR, DURING THE COURSE, SEVERAL EXPERIMENTAL GOALS WILL BE GIVEN, AND EACH STUDENT WILL HAVE TO REACH THEM BY SOLVING, ALSO IN CREATIVE WAY, A SERIES OF INTERMEDIATE PROBLEMS. EVERYTHING WILL BE DONE UNDER THE SUPERVISION AND THE CONTROL OF THE PROFESSOR, WHO WILL PROVIDE FOR ADDRESSING EACH SINGLE STUDENT TOWARDS THE MOST APPROPRIATE SOLUTION WHICH, HOWEVER, WILL HAVE TO BE REACHED AUTONOMOUSLY.

Prerequisites
PREREQUISITES: IT IS NECESSARY TO KNOW THE BASIC THEORY CONCERNING THE ELECTRICAL CIRCUITS, THE ELECTRICAL CURRENT AND THE AC AND DC MAGNETIC FIELDS, AS WELL AS THE PHYSICS RELATED TO THE GENERATION OF MAGNETIC FIELDS AND TO THEIR EFFECTS ON THE MATTER. IT IS REQUESTED TO KNOW ALSO THE EXPERIMENTAL BASIC CONCEPTS CONCERNING THE ELECTRICAL CIRCUITS AND THE INSTRUMENTS USED FOR THEIR ANALYSIS.
Contents
THEORY: ( 24 HOURS. OF LECTURES; 0 LABORAT.)
- A BRIEF SUMMARY OF THE LAW OF ELECTROMAGNETISM; ( 4 HOURS. OF LECTURES; 0 LABORAT.)
- THE MAGNETIC PROPERTIES OF THE MATTER: PHENOMENOLOGY; ( 3 HOURS. OF LECTURES; 0 LABORAT.)
- METHODS FOR THE TREATMENT OF THE PROBLEMS RELATED TO THE GENERATION, MEASUREMENT AND USE OF THE MAGNETIC FIELDS; ( 3 HOURS. OF LECTURES; 0 LABORAT.)
- THEORIES, TECHNIQUES, TECHNOLOGIES AND EQUIPMENT FOR THE MEASUREMENTS AND THE ANALYSIS OF THE MAGNETIC PROPERTIES OF THE MATTER IN DC AND AC FIELDS; ( 4 HOURS. OF LECTURES; 0 LABORAT.)
- HOW TO SOLVE A MAGNETIC PROBLEM BY MEANS OF A SOFTWARE FOR FINITE ELEMENTS ANALYSIS (FEMM2); ( 2 HOURS. OF LECTURES; 0 LABORAT.)
- DETAILED DESCRIPTION OF THE EXPERIMENTS TO BE REALIZED; ( 4 HOURS. OF LECTURES; 0 LABORAT.)
- THE MAGNETIC PROPERTIES OF THE SUPERCONDUCTORS AND THEIR IMPORTANCE FOR THE APPLICATIONS; ( 3 HOURS. OF LECTURES; 0 LABORAT.)
- THE INSTRUMENTS AND EQUIPMENT THAT ARE PRESENT IN A LABORATORY FOR THE RESEARCH OF THE MAGNETIC PROPERTIES OF THE MATTER. ( 1 HOURS. OF LECTURES; 0 LABORAT.)

LABORATORY: THE COURSE INCLUDES 7-9 LABORATORY EXPERIMENTS ( 0 HOURS. OF LECTURES; 36 LABORAT.):
1) MEASUREMENT OF THE MAGNETIC FIELD PRODUCED BY A FINITE SOLENOID, AND ANALYSIS OF THE DIFFERENCES AND ANALOGIES RESPECT TO THE IDEAL CASE; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
2) MEASUREMENT OF THE INTERACTION BETWEEN THE ELECTRICAL CURRENT AND THE MAGNETIC FIELD; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
3) MAGNETIC MATERIALS: MEASUREMENTS OF THE MAGNETIC PERMEABILITY BY USING A HALL PROBE ; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
4) DETERMINATION OF THE INTENSITY OF MAGNETIZATION OF A FERROMAGNETIC ROD WITH THE METHOD OF THE SOLENOID AND THE COMPASS; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
5) MEASUREMENT OF THE MAGNETIC FORCE AND OF THE MAGNETIC MOMENT OF A FERROMAGNETIC SAMPLE BY USING A COUPLE OF HELMHOLTZ COILS; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
6) MEASUREMENT OF THE MAGNETIC PERMEABILITY OF A MATERIAL BY MEANS OF A RESPONSE OF A RL CIRCUIT TO A SQUARE WAVE; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
7) MEASUREMENT OF THE MAGNETIC PERMEABILITY OF AIR; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
8) REALIZATION AND CALIBRATION OF A SIMPLE INSTRUMENT FOR MAGNETIC MEASUREMENTS; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
9) COMPARISON BETWEEN THE MEASURED FIELDS AND THOSE CALCULATED BY USING FEMM2, FOR A GIVEN CONFIGURATION OF 1 OR 2 SOLENOIDS. ( 0 HOURS. OF LECTURES; 4 LABORAT.)
OPTIONAL EXPERIMENT: 10) MEASUREMENT OF THE SPACE DEPENDENCE OF THE FORCE BETWEEN TWO PERMANENT MAGNETS; ( 0 HOURS. OF LECTURES; 4 LABORAT.)
Teaching Methods
THE COURSE IS ORGANISED IN 60 HOURS (6 CFU) OF LECTURES DIVIDED INTO THEORETICAL LECTURES (24 HOURS) AND EXPERIMENTAL LABORATORY LECTURES (36 HOURS). IN PARTICULAR, CLASSROOM LECTURES ARE DEVOTED TO THE THEORY, MAINLY WITH THE GOAL TO REFRESH THE CONCEPTS RELATIVE TO THE MAGNETIC FIELD AND ITS EFFECT ON THE MATTER, TO LEAR SOME EXPERIMENTAL TECHNIQUES AND THE TECHNOLOGY FOR THE ANALYSIS OF THE MAGNETIC PROPERTIES OF THE MATERIALS, AND SOME PRACTICAL ADVICES ON THE PROBLEMS RELATED TO THE MAGNETIC FIELDS. MOREOVER THE LECTURES, WHOSE ATTENDANCE IS NOT MANDATORY BUT IS STRONGLY RECOMMENDED, WILL BE DIRECTED TO DESCRIBE IN DETAILS THE SINGLE EXPERIENCES THAT WILL BE PERFORMED IN THE LABORATORY.
THE LABORATORY LECTURES WILL GIVEN WITH THE AIM TO PERFORM THE EXECUTION OF EXPERIMENTS IN A GIVEN FIXED TIME OF 4 HOURS, HAVING THE POSSIBILITY TO USE ALL IT IS NECESSARY FOR ITS REALIZATION, AND INTERACTING IN CRITICAL AND COSTRUCTIVE WAY WITH THE PROFESSOR. AT EVERY LECTURES, WITH MANDATORY ATTENDANCE, EVERY SINGLE TABLE HOSTS A DIFFERENT EXPERIMENT. THE STUDENTS WILL REALIZE DIFFERENT EXPERIMENTS BY WORKING ON DIFFERENT TABLES EACH LECTURE.
Verification of learning
THE EVALUATION WILL BE DONE BY MEANS OF A FINAL EXAM WITH MARKS EXPRESSED ON A SCALE OF 30, WHERE ALSO THE INTRA-COURSE WRITTEN REPORTS, ABOUT THE PERFORMED EXPERIMENTS, WILL BE DISCUSSED. FOR THIS REASON, IN ORDER TO PERFORM ALL THE EXPERIMENTS, IT IS NECESSARY THAT THE STUDENTS FOLLOW ALL THE LECTURES. IN ORDER TO TAKE THE EXAM, THE LAST INTRA-COURSE WRITTEN REPORT MUST BE GIVEN TO THE PROFESSOR AT LEAST 15 DAYS BEFORE THE DAY OF THE EXAM. THE REPORTS WILL BE EVALUATED BY ANALYZING THE STUDENTS ABILITIES TO ORGANIZE THE EXPERIMENTS AUTONOMOUSLY AND IN A SCIENTIFICALLY CORRECT WAY, TO INDIVIDUATE THE POSSIBLE SOURCES OF ERRORS OR MISINTERPRETATIONS, TO CREATE A PHYSICAL MODEL OF THE PROBLEM UNDER EXAM, TO DETERMINE THE LIMITS OF THE USED EXPERIMENTAL APPROACH, TO FIND SOLUTION FOR THE PROBLEMS ENCOUNTERED DURING THE REALIZATION OF THE EXPERIMENTS, AND TO STRENGTHEN AND DEFEND THEIR OWN APPROACH BY A DEEP ANALYSIS OF THE RELATED THEORY. IF THE INTRA-COURSE WRITTEN REPORTS WILL BE CONSIDERED SUFFICIENT, WITH A MINIMUM MARK OF 18/30, IT WILL BE POSSIBLE TO TAKE THE FINAL EXAM. FOR THE EVALUATION OF THE FINAL MARK, A PARTICULAR ATTENTION WILL BE GIVEN TO THE STUDENT CAPACITY TO CORRELATE THE THEORY WITH THE EXPERIMENTS AND TO IMPROVE HIMSELF BY THE ANALYSIS OF THEIR EVENTUAL MISTAKES, AND TO THE PROGRESSES MADE DURING COURSE. FOR THE “LAUDE”, THE PROFESSOR WILL EVALUATE THE ABILITIES IN THE ORGANIZATION OF THE SINGLE EXPERIMENTS IN A WAY TO INDIVIDUATE AND ELIMINATE THE POSSIBLE SOURCES OF ERRORS AND ARTIFACTS, THE CRITICAL AND SCIENTIFICALLY SOLID APPROACH TO THE ANALYSIS, ALSO WITH THE SUPPORT OF THE THEORY AND/OR OF NUMERICAL SIMULATIONS, OF THE EXPERIMENTALLY OBTAINED DATA, THE AUTONOMY DURING THE EXPERIMENTAL SESSIONS, THE QUALITY OF THE ORAL DISCUSSIONS AND OF THE ORGANIZATION OF THE REPORTS, AND THE TIME TAKEN TO PRESENT TO THE PROFESSOR THE SINGLE FINAL REPORTS.
Texts
RECOMMENDED READINGS:
D. HALLIDAY, R. RESNICK, J. WALKER – FONDAMENTI DI FISICA

C. MENCUCCINI, V. SILVESTRINI – FISICA

C. KITTEL – SOLID STATE PHYSICS

LECTURES NOTES
More Information
LANGUAGE OF THE LECTURES: ITALIAN (OR EVENTUALLY ENGLISH)
FURTHER INFORMATION CAN BE REQUESTED TO PROF. MASSIMILIANO POLICHETTI, E-MAIL: MPOLICHETTI@UNISA.IT
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