Circuit Theorems MCQ Practice Test - Set 02 - ObjectiveBooks

# Practice Test: Question Set - 02

1. 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

2. In order to get maximum power transfer from a capacitive source, the load must have an impedance that is the complex conjugate of the source impedance.
(A) True
(B) False

3. The Norton equivalent current is
(A) The current through the load
(B) The open-current from the source
(C) The short circuit current
(D) None of the above

4. Determine VTH when R1 is 180 Ω and XL is 90 Ω.

(A) 135∠63.4° V
(B) 13.5∠63.4° V
(C) 12.2∠0° V
(D) 122∠0° V

5. An equivalent circuit is one that produces the same voltage and current to a given load as the original circuit that it replaces.
(A) True
(B) False

6. Referring to the given circuit, find ZTH if R is 15 kΩ and RL is 38 kΩ.

(A) 89.82 ∠-51.3° kΩ
(B) 19.2 ∠-38.3° kΩ
(C) 9.38 ∠-51.3° kΩ
(D) 180 ∠-38.3° kΩ

7. The Thevenin equivalent voltage is
(A) Equal to the source voltage
(B) The same as the load voltage
(C) The open circuit voltage
(D) None of the above

8. In an ac circuit, power to the load peaks at the frequency at which the load impedance is the complex conjugate of the output impedance.
(A) True
(B) False

9. In order to get maximum power transfer from a capacitive source, the load must
(A) Have a capacitive reactance equal to circuit resistance
(B) Have an impedance that is the complex conjugate of the source impedance
(C) Be as capacitive as it is inductive
(D) None of the above

10. Determine VTH if R1 is changed to 3.3 kΩ.

(A) 0.574 ∠16.7° V
(B) 4.63 ∠16.7° V
(C) 4.63 ∠39.5° V
(D) 0.463 ∠39.5° V

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