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Home ‣ Electrical Engineering ‣ RLC Circuits and Resonance Comments
  • Question

  • Referring to Problem 20, what is the total parallel resistance (Rp(tot))?


  • Options
  • A. 4.99 Ω
  • B. 499 Ω
  • C. 4,992 Ω
  • D. 6,800 Ω

  • Correct Answer
  • 4,992 Ω 

    • RLC Circuits and Resonance problems

    Search Results

    • 1. A 200 Ω resistor, a coil with 30 Ω of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedance

    • Options
    • A. is 230 Ω
    • B. is 170 Ω
    • C. is 200 Ω
    • D. cannot be determined
      • Discuss
    • 2. A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will

    • Options
    • A. increase
    • B. remain the same
    • C. decrease
    • D. be less selective
      • Discuss
    • 3. The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency

    • Options
    • A. must be increased
    • B. must be decreased
    • C. is held constant
    • D. has no effect
      • Discuss
    • 4. A 120 Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance?

    • Options
    • A. 37.9 Ω
    • B. 3.7 Ω
    • C. 14,400 Ω
    • D. 4,800 Ω
      • Discuss
    • 5. When the frequency of the voltage applied to a series RC circuit is increased, the phase angle

    • Options
    • A. increases
    • B. decreases
    • C. remains the same
    • D. becomes erratic
      • Discuss
    • 6. A resonant circuit has a lower critical frequency of 7 kHz and an upper critical frequency of 13 kHz. The bandwidth of the circuit is

    • Options
    • A. 7 kHz
    • B. 13 kHz
    • C. 20 kHz
    • D. 6 kHz
      • Discuss
    • 7. 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
      • Discuss
    • 8. A 15 Ω resistor, an inductor with 8 Ω inductive reactance, and a capacitor with 12 Ω capacitive reactance are in parallel across an ac voltage source. The circuit impedance is

    • Options
    • A. 12.7 Ω
    • B. 127 Ω
    • C. 4,436 Ω
    • D. 6,174 Ω
      • Discuss
    • 9. A 90 Ω resistor, a coil with 30 Ω of reactance, and a capacitor with 50 Ω of reactance are in series across a 12 V ac source. The current through the resistor is

    • Options
    • A. 9 mA
    • B. 90 mA
    • C. 13 mA
    • D. 130 mA
      • Discuss
    • 10. A 9 mH coil is in parallel with a 0.015 µF capacitor across an 18 kHz ac source. The coil's internal resistance, RW, is 60 Ω. The circuit impedance is

    • Options
    • A. 17,340 Ω
    • B. 1,734 Ω
    • C. 290 Ω
    • D. 1,018 Ω
      • Discuss

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