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  • Question

  • Referring to the given circuit, what is VTH if VS = 12∠0° V?

    Referring to the given circuit, what is VTH if VS = 12?0° V? 4.69?38.7° V 9.38?38.7° V 12?0° V 6?0°


  • Options
  • A. 4.69∠38.7° V
  • B. 9.38∠38.7° V
  • C. 12∠0° V
  • D. 6∠0° V

  • Correct Answer
  • 9.38∠38.7° V 

    • Circuit Theorems in AC Analysis problems

    Search Results

    • 1. Referring to the given circuit, what is ZTH if R1 is changed to 220 Ω?


    • Options
    • A. 225∠12.1° Ω
    • B. 225∠77.9° Ω
    • C. 46∠77.9° Ω
    • D. 46∠12.1° Ω
      • Discuss
    • 2. For the circuit given, determine the Thevenin voltage as seen by RL.


    • Options
    • A. 0.574∠16.7° V
    • B. 5.74∠16.7° V
    • C. 0.574 ∠?16.7° V
    • D. 5.74∠?16.7° V
      • Discuss
    • 3. In applying the superposition theorem,

    • Options
    • 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
      • Discuss
    • 4. For the given circuit, find VTH for the circuit external to RL.


    • Options
    • A. 4.69∠51.3° V
    • B. 4.69∠38.7° V
    • C. 469∠38.7° mV
    • D. 6∠0° V
      • Discuss
    • 5. Referring to the given circuit, L


    • Options
    • 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
      • Discuss
    • 6. Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if VS = 4.5 VRMS?


    • Options
    • A. 226 mW
    • B. 2.26 mW
    • C. 4.24 mW
    • D. 424 mW
      • Discuss
    • 7. The Thevenin equivalent voltage is

    • Options
    • A. equal to the source voltage
    • B. the same as the load voltage
    • C. the open circuit voltage
    • D. none of the above
      • Discuss
    • 8. Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.


    • Options
    • A. 129∠21.4° Ω
    • B. 43.7∠68.6° Ω
    • C. 43.7∠21.4° Ω
    • D. 12.9∠68.6° Ω
      • Discuss
    • 9. Determine VTH for the circuit external to RL in the given figure.


    • Options
    • A. 135∠63.4° V
    • B. 13.5∠63.4° V
    • C. 13.5∠0° V
    • D. 135∠0° V
      • Discuss
    • 10. Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 kΩ.


    • Options
    • A. 1488∠?70.7° Ω
    • B. 3859 ∠?31.2° Ω
    • C. 5180 ∠?50.5° Ω
    • D. 1828∠?50.2° Ω
      • Discuss

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