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Home ‣ Electronics ‣ RL Circuits Comments
  • Question

  • The impedance of a series circuit when R = 15 kΩ and XL = 10 kΩ is approximately equal to ________.


  • Options
  • A. 5 kΩ
  • B. 6 kΩ
  • C. 18 kΩ
  • D. 25 kΩ

  • Correct Answer
  • 18 kΩ 

    • RL Circuits problems

    Search Results

    • 1. The frequency at which XL = R in an RL circuit is called the _______________.

    • Options
    • A. cutoff frequency
    • B. optimum frequency
    • C. bandwidth characteristic
    • D. resonant frequency
      • Discuss
    • 2. The phase angle will increase in a parallel RL circuit if the resistance is increased.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. As the frequency increases in a series RL circuit the impedance also increases.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. Phase angle is the difference in phase between the applied voltage (VS) and the circuit current (IT).

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. In a series RL circuit, a power factor of 0.5 results in less energy conversion to heat than does a power factor of 0.6.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. 

      If VS increases in the given circuit, then the _____.


    • Options
    • A. impedance increases
    • B. real power decreases
    • C. phase angle increases
    • D. current increases
      • Discuss
    • 7. 

      If the frequency decreases in the given circuit, then _____.


    • Options
    • A. IT decreases
    • B. IR increases
    • C. IL increases
    • D. none of the currents will change
      • Discuss
    • 8. 

      In the circuit given is, _____.


    • Options
    • A. VR leads VL
    • B. VR lags VL
    • C. VR is in phase with VL
    • D. VR, VL, and VS are all in phase
      • Discuss
    • 9. 

      The impedance of the circuit in the given circuit is approximately equal to _____.


    • Options
    • A. 2 kΩ
    • B. 750 Ω
    • C. 1.25 kΩ
    • D. 1 kΩ
      • Discuss
    • 10. 

      The phase angle in the circuit in the given circuit is approximately equal to ______.


    • Options
    • A. 53°
    • B. 90°
    • C. 37°
    • D. 0°
      • Discuss

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