# Practice Test: Question Set - 01

**1. Determine**

*V*_{TH}for the circuit external to*R*in the given figure._{L}- (A) 135 ∠63.4°
V

- (B) 13.5 ∠63.4°
V

- (C) 13.5 ∠0°
V

- (D) 135 ∠0°
V

**2. A Thevenin ac equivalent circuit always consists of an equivalent ac voltage source and an equivalent capacitance.**

- (A) True

- (B) False

**3. Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if**

*V*_{S}= 4.5 V_{RMS}?- (A) 226 mW

- (B) 2.26 mW

- (C) 4.24 mW

- (D) 424 mW

**4. Like Thevenin's theorem, Norton's theorem provides a method of reducing a more complex circuit to a simpler, more manageable form for analysis.**

- (A) True

- (B) False

**5. If two currents are in the same direction at any instant of time in a given branch of a circuit, the net current at that instant**

- (A) Is zero

- (B) Is
the sum of the two currents

- (C) Is
the difference between the two currents

- (D) Cannot
be determined

**6. Referring to the given circuit, what is**

*Z*_{TH}if*R*_{1}is changed to 220 Ω?- (A) 225
∠12.1° Ω

- (B) 225
∠77.9° Ω

- (C) 46 ∠77.9° Ω

- (D) 46 ∠12.1° Ω

**7. Norton's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent voltage source in series with an equivalent impedance.**

- (A) True

- (B) False

**8. Thevenin's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent current source in parallel with an equivalent impedance.**

- (A) True

- (B) False

**9. Norton's theorem gives**

- (A) An
equivalent current source in parallel with an equivalent impedance

- (B) An
equivalent current source in series with an equivalent impedance

- (C) An
equivalent voltage source in parallel with an equivalent impedance

- (D) An
equivalent voltage source in series with an equivalent impedance

**10. One circuit is equivalent to another, in the context of Thevenin's theorem, when the circuits produce the same voltage.**

- (A) True

- (B) False

**11. Referring to the given circuit, determine**

*Z*_{TH}as seen by*R*._{L}- (A) 1444 ∠-48.5° Ω

- (B) 4176 ∠-73.3° Ω

- (C) 956 ∠-48.5° Ω

- (D) 1444 ∠-73.3° Ω

**12. Referring to the given circuit, what is**

*V*_{TH}if*V*_{S}= 12 ∠0° V?- (A) 4.69 ∠38.7°
V

- (B) 9.38
∠38.7° V

- (C) 12 ∠0°
V

- (D) 6 ∠0°
V

**13. Determine the frequency at which the maximum power is transferred from the amplifier to the speaker in the given figure.**

- (A) 1,027 Hz

- (B) 10,270 Hz

- (C) 6,330 Hz

- (D) 63,330 Hz

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