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Home ‣ Electrical Engineering ‣ Circuit Theorems in AC Analysis See What Others Are Saying!
  • Question

  • Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 kΩ.

    Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 k?. 1488??70.7° ?


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

  • Correct Answer
  • 1828∠?50.2° Ω 

    • More questions

    • 1. The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

    • Options
    • A. 1,000 V
    • B. 2,000 V
    • C. 31.25 V
    • D. 3,125 V
      • Discuss
    • 2. A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is

    • Options
    • A. 1,616 Ω
    • B. 161 Ω
    • C. 3,387 Ω
    • D. 1,771 Ω
      • Discuss
    • 3. Approximately how much current flows through a 3.3 MΩ resistor across a 30 V source?

    • Options
    • A. 9 µA
    • B. 90 µA
    • C. 900 µA
    • D. 9000 µA
      • Discuss
    • 4. In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

    • Options
    • A. 0 W
    • B. 14.1 W
    • C. 111.5 W
    • D. 1,020 W
      • Discuss
    • 5. A balanced load is one in which all the impedances are equal.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately

    • Options
    • A. 790 Ω
    • B. 470 Ω
    • C. 60 Ω
    • D. 30 Ω
      • Discuss
    • 7. What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?

    • Options
    • A. 4 kVA
    • B. 0.25 kVA
    • C. 16 kVA
    • D. 8 kVA
      • Discuss
    • 8. In a series RLC circuit, the current is minimum at resonance.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. In a series circuit, the individual powers are additive.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. If the voltage is stepped up, the current is stepped down, and vice versa.

    • Options
    • A. True
    • B. False
      • Discuss

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