Question

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-= 120 12 R 112022 Vs = 75 V R32 2202 "X, = 900 12 Figure 19-4 2 3) 23) Given the circuit in Figure 19-4, what load value should be used to replace R2 to obtain the maximum power transfer to the load? Determine the type of load, and express the value in rectangular form. A) 88.1 22-j39.422 B) 64.12 - 373.62 C) 168 2 + j76.82 D) 168 22 - j76.8 22 24) 24) When using the superposition theorem in ac network analysis, which one of the following statements is not true? A) Voltage sources are replaced by short circuits. B) Voltage sources are replaced by open circuits. C) All impedances are replaced by their complex conjugates. D) Current sources are replaced by short circuits. 25) 25) When the load is properly chosen for maximum power transfer, the load will appear A) complex B) totally resistive C) imaginary D) reactive

Answer 1

@ to find 2tr 23) L-short voltage-source -1120 120 7220 27 3 5900 f J .B ZTH = 2201-J120) 120 111700) qni (220)(-1120) + (20)(1903). 220-J120 120+ 1900 ZTH = 50.445–592.474 + 117.103 + 375.72 ZTH = 168.349 -776763 a . I ZH = 168-349-57-6,763 a for maximum power tronsfor Zoche z7h = 167.349 +5 76.963 in y option © is true.

24) when using super position - 4 short voltage Source Coption ) Lopen current source is true for maximum.powertro mar Totally resistive 25) load