|Electricity and energy
Ocorrência: 2021/2022 - 1S
Ciclos de Estudo/Cursos
|Nº de Estudantes
|Plano de Estudos
|Horas de Contacto
|Plano de Estudos_2015_16
Docência - Responsabilidades
Docência - Horas
|Theorethical and Practical :
Língua de trabalho
The course unit of Electrotechnics is a sciences engineering field base. The learning of the methods and physical concepts underlying it, aims to develop in students fundamental skills that allow them to understand the electromagnetic phenomena and master the main techniques of electrical circuits analysis in direct and alternating current.
Resultados de aprendizagem e competências
At the end of this Curricular Unit, the student should be able to:
1- Understand and explain the principles that support electrostatic phenomena. Distinguish the concepts and know how to apply them.
2- Identify the electrical quantities and properties of stationary current. Differentiate the electrical components and apply, with discretion, techniques for analyzing direct current circuits.
3- Understand and explain the fundamentals of magnetostatics, as well as apply the laws that govern it.
4- Identify a variable electromagnetic field and describe its effects.
5- Analyze sinusoidal alternating single-phase circuits in steady state.
6- Perform laboratory procedures and practices in order to experiment, validate and consolidate theoretical knowledge.
Modo de trabalho
Pré-requisitos (conhecimentos prévios) e co-requisitos (conhecimentos simultâneos)
Knowledge of solving systems of equations, analysis of complex numbers and basic concepts in the field of electrotechnics.
1. Introduction to Electrotechnics course.
2. Fundamentals of Electrostatics
Electric charge; electrostatic force; Coulomb's Law. Electric field; Electric potential; Electric tension. Condensers and dielectrics; capacitor association.
3. Stationary Electric Current
Electric Current Intensity; Electrical Resistance; Ohm's Law; Resistance Association; Voltage and current dividers. Electric power sources; Voltage and Current Sources; Electric circuit; Power and Energy; Joule's Law. Analysis of Resistive Circuits in DC. Kirchhoff's Laws. Overlay Theorem. Thevenin and Norton theorems.
Classification of magnetic materials; Ampere's Law; magnetic flux; Magnetomotive force; Magnetic reluctance; Magnetic saturation; coils; Analysis of Magnetic Circuits; Hopkinson's Law. Analogy between electric and magnetic circuits.
5. Variable Electromagnetic Field
Faraday's Law; Coefficient of self-induction and mutual induction; Transformer working principle; Operating principle of mechanical electric power generators; Operating principle of motors (Laplace force).
6. Circuits in Quasi-Stationary Regime
Fundamental notions: sinusoidal alternating quantities; average value and effective value; complex or symbolic representation of an alternating sinusoidal function. Analysis of Sinusoidal Single-Phase Alternating Circuits in Steady State: Circuit R; RL; CR; RLC; Notions of impedance and reactance; Association of impedances; Active, Reactive and Apparent Powers; Power factor. Three-phase circuits (balanced three-phase system).
Máximo Rosado; Folhas teóricas de apoio às aulas teóricas-práticas
Nelson Martins; Introdução à Teoria da Eletricidade e do Magnetismo . ISBN: ISBN: 9788521202110
Métodos de ensino e atividades de aprendizagem
Theoretical-practical classes, where a teaching methodology is used in which pedagogical techniques of active learning are applied, involving the student more in the process of acquiring knowledge. On the one hand, it allows students, in the exercise of learning activities in the classroom environment, to interact and internalize the contents, developing appropriate attitudes and competences in line with the proposed objectives. On the other hand, the greater involvement of the student in the learning process and in the construction of their competences contributes to the development of their critical spirit and greater autonomy.
Laboratory classes, where practical works are carried out that allow the experimentation and validation of the subjects taught in the theoretical classes.
Tipo de avaliação
Distributed evaluation with final exam
Componentes de Avaliação
Componentes de Ocupação
|Frequência das aulas
Obtenção de frequência
1- The continuous assessment regime
Students who intend to attend the UC under continuous assessment are required to carry out all assessments of the two components:
- Theoretical-practical component (Tp) is evaluated by tests. The Tp component grade is given by the average of the tests.
- Laboratory Component (L) with mandatory completion of laboratory work. The evaluation of the laboratories is composed of the performance in class and of the reports and other documents presented of the different laboratory works.
2- Assessment regime by exams with mandatory laboratory work
Students who choose the assessment system by exams will take a written test in which all the subjects corresponding to the Tp component will be evaluated. Examination tests are carried out at scheduled times at School level.
The minimum grade for the average of the Tests, the Laboratory Component and the Exam is 9.5 (nine point five points) .
3-Evaluation regime at the time of exams
The exam consists of two parts, one for the first part, and one for the second part. Students who did not pass the continuous assessment system and are obliged to take an exam for their approval, may decide not to take one of the parts of that exam and, in that part, they will be awarded the classification obtained in the corresponding test. The classifications obtained in the parts carried out in the exam replace those eventually obtained in tests for the calculation of the average Tp.
Fórmula de cálculo da classificação final
Final grade (NF) in the continuous assessment regime is given by:
NF = 65% Tp + 35% L;
The final grade (NF) in the assessment system by exams will be the weighted average of the classification obtained at the time of the exam (NE) and that obtained in the mandatory Laboratory component (L) or equivalent,
NF = 65% NE + 35% L ;
Students who have obtained NF ≥9.5 values will be approved with the final classification (NF) determined by rounding up to units.
The contents and teaching materials to support the study can be found on the Electrotechnics page on moodle.
By the end of the second week of classes, students covered by special statutes (student worker, association manager, high-level athletes, etc.) must inform the UC responsible for their specific situation and respective implications for the evaluations.