The subject of Applied Electrotechnics has like general aim complete the training of the students that go to study the Degree of Engineering in Industrial Technologies in the Theory of Circuits and of the Electric Machines so as to suplly him specific tools that allow him board, analyze and evaluate the behaviour of the electric circuits so much in stable as in transitory regime. The subject is conceived to suplly knowledges, objective and competitions that are necessary to board with guarantees other subjects of the courses 3º and 4º. To a suitable use of this subject and that do not suppose a additional effort for the student, would owe to have studied previously the subjects of Bases of Theory of Circuits and Electric Machines and Calculation I and II since we will give by imparted basic knowledges of both subjects that serve of starting point stop the development of the Applied Electrotechnics.