After the student has passed this subject, he/she will be able to: - Describe the basic aspects of the structure and operation of electric circuits and power systems (single- and three-phase), employing a proper wording and terminology, in terms of their fundamental variables: voltages, currents, power, impedances, and power factor. - Analyze whatever electrical circuit in steady-state, calculating voltages, currents and power in each element, using systematic methods (nodal analysis, mesh analysis) as well as non-systematic ones (circuit reduction, grouping of elements, etc). Also he/she will be able to describe the behaviour of any dipole by substituting the balance of the circuit by its Thevenin or Norton equivalent. - Perform this type of analysis on any a.c. circuit at constant frequency, representing the corresponding magnitudes by their associate complex phasors. - Correctly choose and operate electrical instruments to carry out experimental measurements on a real circuit. - Use the single-phase equivalent to analyze a simple balanced three-phase circuit, and correctly apply reactive power compensation techniques by insertion of banks of capacitors. - Describe, justify, and explain the rationale underlying the structure and operation of the electric power systems, and the role of transformers and electrical machines.