5555555555 56. Referring to the given circuit, find ZTH if VS is 18 ∠0° V. (a) 9.82 ∠–51.3° kΩ (b) 9.38 ∠–51.3° kΩ (c) 180 ∠–38.3° kΩ (d) 19.2 ∠–38.3° kΩ
5555555555 53. For the circuit given, determine the Thevenin voltage as seen by RL. (a) 0.574 ∠16.7° V (b) 5.74 ∠16.7° V (c) 0.574 ∠–16.7° V (d) 5.74 ∠–16.7° V
5555555555 47. Referring to the given circuit, find ZTH for the part of the circuit that is external to RL. (a) 129 ∠21.4° Ω (b) 43.7 ∠68.6° Ω (c) 43.7 ∠21.4° Ω (d) 12.9 ∠68.6° Ω