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MCQs

Total Questions : 65 | Page 5 of 7 pages
Question 41. . How much current will flow in a series RLC circuit when VT = 100 V, XL = 160 omega.gif, XC = 80 omega.gif, and R = 60 omega.gif?
  1.    1 A
  2.    1 mA
  3.    6.28 A
  4.    10 A
 Discuss Question
Answer: Option A. -> 1 A
Question 42. . At any resonant frequency, what voltage is measured across the two series reactive components?
  1.    applied
  2.    reactive
  3.    zero
  4.    inductive and capacitive
 Discuss Question
Answer: Option C. -> zero
Question 43. . At any resonant frequency, what net voltage is measured across the two series reactive components?
  1.    Applied voltage
  2.    Reactive voltage
  3.    Zero voltage
  4.    VL + VC voltage
 Discuss Question
Answer: Option C. -> Zero voltage
Question 44. . What is the total impedance of a 60 Hz series RLC circuit when XL = 7.5 ohms, XC = 265.3 ohms, and R = 33 ohms?
  1.    257.8 ohms
  2.    259.9 ohms
  3.    290.8 ohms
  4.    1989.75 ohms
 Discuss Question
Answer: Option B. -> 259.9 ohms
Question 45. . What is the range between f1 and f2 of an RLC circuit that resonates at 150 kHz and has a Q of 30?
  1.    100.0 kHz to 155.0 kHz
  2.    147.5 kHz to 152.5 kHz
  3.    4500 kHz to 295.5 kHz
  4.    149,970 Hz to 150,030 Hz
 Discuss Question
Answer: Option B. -> 147.5 kHz to 152.5 kHz
Question 46. . Series RLC impedance or voltage totals must always be calculated by
  1.    adding values vectorially
  2.    graphing the angles
  3.    multiplying the values
  4.    subtracting the values
 Discuss Question
Answer: Option A. -> adding values vectorially
Question 47. . If the bandwidth of a filter increases:
  1.    Q decreases
  2.    the roll-off rate increases
  3.    the half-power frequency decreases
  4.    the center frequency decreases
 Discuss Question
Answer: Option A. -> Q decreases
Question 48. . What is the high cutoff frequency for an RLC circuit that resonates at 2000 Hz and has a bandwidth of 250 Hz?
  1.    2125 Hz
  2.    2250 Hz
  3.    1750 Hz
  4.    8.0 Hz
 Discuss Question
Answer: Option A. -> 2125 Hz
Question 49. . Current in a series RLC circuit may always be used as:
  1.    a leading vector
  2.    a reference
  3.    an angle
  4.    a lagging vector
 Discuss Question
Answer: Option B. -> a reference
Question 50. . When a parallel tank is used in series with an output load resistor the filter is a(n) ______ filter.
  1.    band-stop
  2.    low-pass
  3.    bandpass
  4.    high-pass
 Discuss Question
Answer: Option A. -> band-stop

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