Electrical Circuits (B) - Quiz 1

70 Questions | Total Attempts: 324

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Electrical Circuits (B) - Quiz 1 - Quiz

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Questions and Answers
  • 1. 
    When two loops with or without contacts between them affect eachother through the magnetic field generated by one of them, they aresaid to be magnetically coupled.
    • A. 

      True

    • B. 

      False

  • 2. 
    The resonant circuit consists only of a capacitor with a voltage or current source.
    • A. 

      True

    • B. 

      False

  • 3. 
    This curve is for bandstop filter
    • A. 

      True

    • B. 

      False

  • 4. 
    The resonant circuit consists only of inductor with a voltage or current source.
    • A. 

      True

    • B. 

      False

  • 5. 
    This curve indicates that power willbe a maximum at fr and varying thefrequency in either direction resultsin a rise of the power.
    • A. 

      True

    • B. 

      False

  • 6. 
    The value of ω that satisfies this condition is called the resonant frequency 
    • A. 

      True

    • B. 

      False

  • 7. 
    The bandwidth is the average between the half power points on the response curve of the filter. 
    • A. 

      True

    • B. 

      False

  • 8. 
    The total impedance of RLC parallel circuit is given in the shown relation
    • A. 

      True

    • B. 

      False

  • 9. 
    The phase of The current across coil in series resonant circuit is +90 when the supply is 5Sinωt
    • A. 

      True

    • B. 

      False

  • 10. 
    In RLC series resonance the Magnitude of inductive reactance must Eliminates the Magnitude of capacitive reactance to result a pure inductor 
    • A. 

      True

    • B. 

      False

  • 11. 
    Since the current is maximum at resonance,it follows that the power  must similarly be maximum at resonance.
    • A. 

      True

    • B. 

      False

  • 12. 
    The power response of a series resonant circuit has a  bell-shaped curve called the selectivity curve.
    • A. 

      True

    • B. 

      False

  • 13. 
    If the bandwidth of a circuit is kept very narrow , the circuit is said to have a Low selectivity
    • A. 

      True

    • B. 

      False

  • 14. 
    The Bandwidth of the resonant circuit (BW) is The difference between the frequencies at which the circuit delivers half of the maximum power.
    • A. 

      True

    • B. 

      False

  • 15. 
    The resonant frequency is the geometric mean of the half-power frequencies. The resonant frequency is the geometric sum of the half-power frequencies.
    • A. 

      True

    • B. 

      False

  • 16. 
    The “sharpness” of the resonance in a resonant circuit is measured quantitatively by the quality factor Q.
    • A. 

      True

    • B. 

      False

  • 17. 
    The quality factor of resonance circuit doesn't depent on resistance
    • A. 

      True

    • B. 

      False

  • 18. 
    In series resonance, The higher the value of Q , the more selective the circuit is but more bandwidth.
    • A. 

      True

    • B. 

      False

  • 19. 
    In series resonance, If the band of frequencies to be selected or rejected is narrow, the quality factor of the resonant circuit must be high.
    • A. 

      True

    • B. 

      False

  • 20. 
    At parallel resonance, the admittance consists only conductance G = 1/2R.
    • A. 

      True

    • B. 

      False

  • 21. 
    At parallel resonance,The value of current will be minimum since the total admittance is maximun
    • A. 

      True

    • B. 

      False

  • 22. 
    At parallel resonance,The Power factor is unity.
    • A. 

      True

    • B. 

      False

  • 23. 
    At parallel resonance, The currents through the inductor and the capacitor have the same magnitudes but are 90 out of phase.
    • A. 

      True

    • B. 

      False

  • 24. 
    The magnitude of current in the reactive elements at parallel resonance is Q times Lower than the applied source current.
    • A. 

      True

    • B. 

      False

  • 25. 
    In practical parallel resonance , if the internal resistance of the coil is negligable , so the resonance frequency of the circuit will be equal to the resonant frequency of ideal parallel resonance
    • A. 

      True

    • B. 

      False

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