5555555555 43. For the circuit shown, determine ZTH for the portion of the circuit external to RL. (a) 66.7 ∠–33.7° kΩ (b) 6.67 ∠–333.7° kΩ (c) 14.4 ∠–56.3° kΩ (d) 1.44 ∠–33.7° 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 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