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Home ‣ Electrical Engineering ‣ RC Circuits See What Others Are Saying!
  • Question

  • A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is


  • Options
  • A. Z = 47 Ω + j150 Ω
  • B. Z = 47 Ω ? j150 Ω
  • C. Z = 197 Ω
  • D. Z = 103 Ω

  • Correct Answer
  • Z = 47 Ω ? j150 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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