MCQ on Circuit Theorems in AC Analysis - ObjectiveBooks
MCQ on Circuit Theorems in AC Analysis

MCQ on Circuit Theorems in AC Analysis

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Practice Test: Question Set - 03

1. For the given circuit, find VTH for the circuit external to RL.
Circuit Theorems in AC Analysis Figure 11
    (A) 4.69 ∠51.3° V
    (B) 4.69 ∠38.7° V
    (C) 469 ∠38.7° mV
    (D) 6 ∠0° V
2. The superposition theorem is useful for the analysis of single-source circuits.
    (A) True
    (B) False
3. For the circuit shown, determine ZTH for the portion of the circuit external to RL.
Circuit Theorems in AC Analysis Figure 12
    (A) 66.7 ∠-33.7° kΩ
    (B) 6.67 ∠-333.7° kΩ
    (C) 14.4 ∠-56.3° kΩ
    (D) 1.44 ∠-33.7° kΩ
4. The two basic components of a Thevenin equivalent ac circuit are
    (A) The equivalent voltage source and the equivalent series impedance
    (B) The equivalent voltage source and the equivalent series resistance
    (C) The equivalent voltage source and the equivalent parallel impedance
    (D) The equivalent voltage source and the equivalent parallel resistance
5. Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 kΩ.
Circuit Theorems in AC Analysis Figure 13
    (A) 1488 ∠-70.7° Ω
    (B) 3859 ∠-31.2° Ω
    (C) 5180 ∠-50.5° Ω
    (D) 1828 ∠-50.2° Ω
6. Referring to the given circuit, find ZTH if VS is 18∠0° V.
Circuit Theorems in AC Analysis Figure 14
    (A) 9.82 ∠-51.3° kΩ
    (B) 9.38 ∠-51.3° kΩ
    (C) 180 ∠-38.3° kΩ
    (D) 19.2 ∠-38.3° kΩ
7. The superposition theorem is useful for circuit analysis only in ac circuits.
    (A) True
    (B) False
8. Referring to the given circuit, L
Circuit Theorems in AC Analysis Figure 15
    (A) Must be in parallel with RL
    (B) Must be placed in parallel with VS
    (C) Must have a reactance equal to XC
    (D) Has no effect on the result
9. In applying the superposition theorem,
    (A) The sources are considered one at a time with all others replaced by their internal impedance
    (B) All sources are considered independently
    (C) All sources are considered simultaneously
    (D) The sources are considered one at a time with all others replaced by their internal resistance
10. Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.
Circuit Theorems in AC Analysis Figure 16
    (A) 129 ∠21.4° Ω
    (B) 43.7 ∠68.6° Ω
    (C) 43.7 ∠21.4° Ω
    (D) 12.9 ∠68.6° Ω
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