Understanding and study of: (1) atomic theory, knowledge and circuit parameters, (3) basic laws of electricity and basic theory of electrical circuits, (4) direct current electric power (5) mesh current analysis (mesh current analysis) by means of elimination, (6) mesh current analysis using a matrix method, (7) node voltage analysis using a matrix method, (8) node voltage analysis using a matrix method, ( 9) resistance network analysis. Presented in theoretical, problem solving and practical form.