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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. What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary?

    • Options
    • A. 0.4
    • B. 4
    • C. 9.6
    • D. 0.96
      • Discuss
    • 2. Thevenin's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent current source in parallel with an equivalent impedance.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A resistor ladder network is a special type of series-parallel circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. In a certain series resonant circuit, VC = 125 V, VL = 125 V, and VR = 40 V. The value of the source voltage is

    • Options
    • A. 125 V
    • B. 250 V
    • C. 290 V
    • D. 40 V
      • Discuss
    • 5. One circuit is equivalent to another, in the context of Thevenin's theorem, when the circuits produce the same voltage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A 75 Ω load uses 2 W of power. The output voltage of the power supply is approximately

    • Options
    • A. 120 V
    • B. 1.2 V
    • C. 12 V
    • D. 6 V
      • Discuss
    • 7. A 2 kΩ resistor and a 0.002 µF capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is

    • Options
    • A. 84.5 mW
    • B. 845 mW
    • C. 13 mW
    • D. 130 mW
      • Discuss
    • 8. Three 15 mH inductors are in series. The total inductance is

    • Options
    • A. 15 mH
    • B. 30 mH
    • C. 45 mH
    • D. 5 mH
      • Discuss
    • 9. A parallel circuit acts as a current divider.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A capacitor blocks ac but passes dc.

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

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