Basic circuit analysis - City U

Prof. Tse: Basic CircuitAnalysis1 EIE209 Basic ElectronicsBasic circuit analysisProf. Tse: Basic CircuitAnalysis2 Fundamental quantities Voltage potential difference bet. 2 points across quantity analogous to pressure between two points Current flow of charge through a material through quantity analogous to fluid flowing along a pipeProf. Tse: Basic CircuitAnalysis3 Units of measurementnVoltage: volt (V)nCurrent: ampere (A)nNOT Volt, Ampere!!Prof. Tse: Basic CircuitAnalysis4 Power and energyWork done in moving a charge dq from A toB having a potential difference of V isW = V dqPower is work done per unit time, ,ABdqProf. Tse: Basic CircuitAnalysis5 Direction and polaritynCurrent direction indicates the direction of flow of positive chargenVoltage polarity indicates the relative potential between 2 points:+ assigned to a higher potential point; and assigned to alower potential : Direction and polarity are arbitrarily assigned on circuitdiagrams.

Prof. C.K. Tse: Basic Circuit Analysis 27 Thévenin and Norton theorems Let’s look at the logic behind these theorems (quite simple really). If we write down KVL, KCL, and Ohm’s law equations correctly, we will have a number of equations with the same number of unknowns. Then, we can try to solve them to get what we want.

Loading..

Tags:

  Basics, Logic

Information