Circuit Theorems in AC Analysis - General Questions

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Circuit Theorems in AC Analysis - General Questions

1. 

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

Answer: Option A

Explanation:

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2. 

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

Answer: Option A

Explanation:

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3. 
 

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

Answer: Option D

Explanation:

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4. 

Referring to the given circuit, what is VTH if VS = 120° V?
A. 4.69∠38.7° V
B. 9.38∠38.7° V
C. 12∠0° V
D. 6∠0° V

Answer: Option B

Explanation:

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5. 

Determine VTH if R1 is changed to 3.3 k.
A. 0.574∠16.7° V
B. 4.63∠16.7° V
C. 4.63∠39.5° V
D. 0.463∠39.5° V

Answer: Option C

Explanation:

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6. 

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

Answer: Option C

Explanation:

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7. 

Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if VS = 4.5 VRMS?
A. 226 mW
B. 2.26 mW
C. 4.24 mW
D. 424 mW

Answer: Option D

Explanation:

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8. 

Referring to the given circuit, determine ZTH as seen by RL.
A. 1444∠–48.5°
B. 4176∠–73.3°
C. 956∠ –48.5°
D. 1444∠ –73.3°

Answer: Option A

Explanation:

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