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Home ‣ Electrical Engineering ‣ RLC Circuits and Resonance See What Others Are Saying!
  • Question

  • A resistor of 3 kΩ, a 0.05 µF capacitor, and a 120 mH coil are in series across a 5 kHz, 20 V ac source. What is the impedance, expressed in polar form?


  • Options
  • A. 636 Ω
  • B. 3,769 Ω
  • C. 433 Ω
  • D. 4,337 Ω

  • Correct Answer
  • 4,337 Ω 

    • More questions

    • 1. Total current in an RC circuit always leads the source voltage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. In 40 kW, there are

    • Options
    • A. 0.4 mW
    • B. 40,000 W
    • C. 400 W
    • D. 5,000 W
      • Discuss
    • 3. Energy is stored by a capacitor in a magnetic field.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. A filter passes all frequencies.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. A series circuit acts as a current divider.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A transformer responds only to dc.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A half-watt is equal to how many milliwatts?

    • Options
    • A. 5,000 mW
    • B. 5 mW
    • C. 500 mW
    • D. 50 mW
      • Discuss
    • 8. To step 120 V ac up to 900 V ac, the turns ratio must be

    • Options
    • A. 75
    • B. 750
    • C. 7.5
    • D. 0.13
      • Discuss
    • 9. A transformer consists of two or more cores that are electrically coupled on a common core.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The sum of the currents into a junction is equal to the sum of the currents out of that junction.

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

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