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MCQs

Total Questions : 61 | Page 6 of 7 pages
Question 51.  What is the true power of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?
  1.    313.45 W
  2.    12.8 W
  3.    44.96 W
  4.    22.3 W
 Discuss Question
Answer: Option B. -> 12.8 W
Question 52.  What is the magnitude of the phase angle between the source voltage and current when a 100 mH inductor with an inductive reactance of 6 komega.gif and a 1 komega.gif resistor are in series with a source?
  1.    0.1°
  2.    9.0°
  3.    61.0°
  4.    81.0°
 Discuss Question
Answer: Option D. -> 81.0°
Question 53.  If XL= 100 omega.gif and R = 100 omega.gif, then impedance will be
  1.    141.4 omega.gif
  2.    14.14 omega.gif
  3.    100 omega.gif
  4.    200 omega.gif
 Discuss Question
Answer: Option A. -> 141.4 omega.gif
Question 54.  Which of the following statements is true about a lag network?
  1.    An increase in frequency causes an increase in phase lag.
  2.    An increase in frequency causes an increase in the magnitude of the output voltage.
  3.    A decrease in frequency causes an increase in phase lag.
  4.    A decrease in frequency causes a decrease in the magnitude of the output voltage.
 Discuss Question
Answer: Option A. -> An increase in frequency causes an increase in phase lag.
Question 55.  What is the magnitude of the phase angle of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?
  1.    0.001°
  2.    2.3°
  3.    87.6°
  4.    89.9°
 Discuss Question
Answer: Option B. -> 2.3°
Question 56.  As frequency increases
  1.    both series and parallel RL impedance decrease
  2.    series RL impedance decreases and parallel RL impedance increases
  3.    series RL impedance increases and parallel RL impedance decreases
  4.    both series and parallel RL impedance increase
 Discuss Question
Answer: Option D. -> both series and parallel RL impedance increase
Question 57. . What is the magnitude of the phase angle between the source voltage and current when a 100 mH inductor with an inductive reactance of 6 komega.gif and a 1 komega.gif resistor are in series with a source?
  1.    0.1°
  2.    9.0°
  3.    61.0°
  4.    81.0°
 Discuss Question
Answer: Option D. -> 81.0°
Question 58.  What is the true power of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?
  1.    313.45 W
  2.    12.8 W
  3.    44.96 W
  4.    22.3 W
 Discuss Question
Answer: Option B. -> 12.8 W
Question 59. . If XL= 100 omega.gif and R = 100 omega.gif, then impedance will be
  1.    141.4 omega.gif
  2.    14.14 omega.gif
  3.    100 omega.gif
  4.    200 omega.gif
 Discuss Question
Answer: Option A. -> 141.4 omega.gif
Question 60. . What is the magnitude of the phase angle of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?
  1.    0.001°
  2.    2.3°
  3.    87.6°
  4.    89.9°
 Discuss Question
Answer: Option B. -> 2.3°

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