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Home Electrical Engineering RLC Circuits and Resonance Comments

  • Question
  • 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

  • Correct Answer
  • 40 V 


  • RLC Circuits and Resonance problems


    Search Results


    • 1. In a series RLC circuit that is operating above the resonant frequency, the current

    • Options
    • A. lags the applied voltage
    • B. leads the applied voltage
    • C. is in phase with the applied voltage
    • D. is zero
    • Discuss
    • 2. A 15 Ω resistor, a 220 µH coil, and a 60 pF capacitor are in series across an ac source. What is the bandwidth of the circuit?

    • Options
    • A. 138 MHz
    • B. 10,866 Hz
    • C. 1,907 Hz
    • D. 138 kHz
    • Discuss
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. 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
    • 7. If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth

    • Options
    • A. disappears
    • B. becomes sharper
    • C. increases
    • D. decreases
    • Discuss
    • 8. A 6.8 kΩ resistor, a 7 mH coil, and a 0.02 µF capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, RW, is 30 Ω. The equivalent parallel resistance, Rp(eq), is

    • Options
    • A. 1,878 Ω
    • B. 18,780 Ω
    • C. 18,750 Ω
    • D. 626 Ω
    • Discuss
    • 9. A certain series RLC circuit with a 200 Hz, 15 V ac source has the following values: R = 12 Ω, C = 80 µF, and L = 10 mH. The total impedance, expressed in polar form, is

    • Options
    • A. 12.28∠12.34° Ω
    • B. 12.57∠12.34° Ω
    • C. 9.95∠12.34° Ω
    • D. 12.62∠12.34° Ω
    • Discuss
    • 10. A 24 Ω resistor, an inductor with a reactance of 120 Ω, and a capacitor with a reactance of 120 Ω are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is

    • Options
    • A. 60 V
    • B. 660 V
    • C. 30 V
    • D. 300 V
    • Discuss


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