# EE 202 – Circuit theory I

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EE 202 – Circuit theory I; Weekly hours: 2+1, ECTS: 5
The course presents the fundamentals of circuit theory, including basic electrotechnics. The aim of the course is to introduce students the general knowledge about the circuit analysis. The curriculum includes the following themes: Beginning with traditional subjects such as defining voltage, current, power, sources, Ohm’s and Kirchhoff’s laws, it proceeds to develop general procedures (nodal and mesh analyses) used in analyzing electric circuits. Thévenin’s and Norton’s theorems. Circuits with DC sources. The lectures contain outlines of the theory. The exercises are based on worked examples, as solved problems. A number of laboratory exercises are also included in the course. In addition, WEB educypedia animations and Java applets are used to visualize the electric circuit occurrences. Homework as good practice for encouraging students to learn continuously and to check their understanding is assigned. Introduction. SI Units (a review), basic units, derived units, standard SI units. Electric quantities. Basic electrical measuring instruments. Standard symbols of circuit components. DC Circuit Analysis: Ohm’s law. Passive devices – resistors. Voltage and current relations. Independent and dependent sources. Networks and circuits: general definitions. Branch and node, loop and mesh. Kirchhoff’s laws: Kirchhoff’s current law – KCL, Kirchhoff’s voltage law – KVL. Solving procedures of simple circuits. DC circuits: resistors in series, in parallel, series/parallel combinations. Voltage/current division: potentiometer and shunt. Analysis strategy of mixed circuits. Delta–Wye (Δ/Y) and Wye–Delta (Y/Δ) transformations. Network analysis techniques: branch current method – BCM, mesh current method – MCM, node voltage method – NVM. DC circuits theorems: source transformations of independent voltage/current sources. Superposition. Thévenin’s theorem. Norton’s theorem. Maximum power transfer theorem.