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Circuit Theorems in AC Analysis problems

  • 1. Referring to the given circuit, find ZTH if VS is 18∠0° V.

    Electrical Engineering Circuit Theorems in AC Analysis: Referring to the given circuit, find ZTH if VS is 18?0° V.

  • Options
  • A. 9.82 ∠?51.3° kΩ
  • B. 9.38∠?51.3° kΩ
  • C. 180 ∠?38.3° kΩ
  • D. 19.2 ∠?38.3° kΩ
    • Discuss
  • 2. The Norton equivalent current is

  • Options
  • A. the current through the load
  • B. the open-current from the source
  • C. the short circuit current
  • D. none of the above
    • Discuss
  • 3. Determine VTH when R1 is 180 Ω and XL is 90 Ω.

    Electrical Engineering Circuit Theorems in AC Analysis: Determine VTH when R1 is 180 ? and XL is

  • Options
  • A. 135∠63.4° V
  • B. 13.5∠63.4° V
  • C. 12.2∠0° V
  • D. 122∠0° V
    • Discuss
  • 4. Referring to the given circuit, determine ZTH as seen by RL.

    Electrical Engineering Circuit Theorems in AC Analysis: Referring to the given circuit, determine ZTH as seen by RL.

  • Options
  • A. 1444∠?48.5° Ω
  • B. 4176 ∠?73.3° Ω
  • C. 956 ∠?48.5° Ω
  • D. 1444 ∠?73.3° Ω
    • Discuss
  • 5. The two basic components of a Thevenin equivalent ac circuit are

  • Options
  • 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
    • Discuss
  • 6. Referring to the given circuit, L

    Electrical Engineering Circuit Theorems in AC Analysis: 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
  • 7. For the given circuit, find VTH for the circuit external to RL.

    Electrical Engineering Circuit Theorems in AC Analysis: 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
  • 8. 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
  • 9. For the circuit given, determine the Thevenin voltage as seen by RL.

    Electrical Engineering Circuit Theorems in AC Analysis: 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
  • 10. Referring to the given circuit, what is ZTH if R1 is changed to 220 Ω?

    Electrical Engineering Circuit Theorems in AC Analysis: Referring to the given circuit, what is ZTH if R1 is changed to

  • Options
  • A. 225∠12.1° Ω
  • B. 225∠77.9° Ω
  • C. 46∠77.9° Ω
  • D. 46∠12.1° Ω
    • Discuss

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