Page 45 - NETWORK ANALYSIS
P. 45

38
                                                                                                                       Thevenin Theorem

                       Example 4


                       Calculate the current that flows through (2 + j4) Ω by using Thevenin’s theorem.
















                                                          Figure 2.4(a)



                       Step 1


                       Remove the impedance (2 + j4) Ω and replace current source with an open circuit.
















                                                      Figure 2.4(b)










                                                       Zth  = (j3 – j5) is parallel to 4 Ω

                                                         = (j3 – j5) // 4

                                                          =  (– j2)(4)
                                                           (4 – j2)
                                                         = (0.8 – j1.6) Ω

                             Figure 2.4(c)
   40   41   42   43   44   45   46   47   48   49   50