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  • Question

  • Determine VTH if R1 is changed to 3.3 kΩ.

    Determine VTH if R1 is changed to 3.3 k?. 0.574?16.7° V 4.63?16.7° V 4.63?39.5° V 0.463?39.5° V


  • Options
  • A. 0.574∠16.7° V
  • B. 4.63∠16.7° V
  • C. 4.63∠39.5° V
  • D. 0.463∠39.5° V

  • Correct Answer
  • 4.63∠39.5° V 

    • Circuit Theorems in AC Analysis problems

    Search Results

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


    • Options
    • A. 1,027 Hz
    • B. 10,270 Hz
    • C. 6,330 Hz
    • D. 63,330 Hz
      • Discuss
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. Norton's theorem gives

    • Options
    • 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
      • Discuss
    • 7. 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

    • Options
    • A. is zero
    • B. is the sum of the two currents
    • C. is the difference between the two currents
    • D. cannot be determined
      • Discuss
    • 8. Referring to the given circuit, find ZTH if R is 15 kΩ and RL is 38 kΩ.


    • Options
    • A. 89.82 ∠?51.3° kΩ
    • B. 19.2 ∠?38.3° kΩ
    • C. 9.38∠?51.3° kΩ
    • D. 180 ∠?38.3° kΩ
      • Discuss
    • 9. In order to get maximum power transfer from a capacitive source, the load must

    • Options
    • 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
      • Discuss
    • 10. For the circuit shown, determine ZTH for the portion of the circuit external to RL.


    • Options
    • A. 66.7 ∠?33.7° kΩ
    • B. 6.67∠?333.7° kΩ
    • C. 14.4 ∠?56.3° kΩ
    • D. 1.44 ∠?33.7° kΩ
      • Discuss

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