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MCQs

Total Questions : 63 | Page 5 of 7 pages
Question 41. What is the power factor of a series RLC circuit under resonance condition?
  1.    0
  2.    1
  3.    Infinity
  4.    100
 Discuss Question
Answer: Option B. -> 1
Answer: (b).1
Question 42. What is the correct formula for quality factor?
  1.    Q=BW*fr
  2.    Q=BW/fr
  3.    Q=fr/BW
  4.    Q=fr²
 Discuss Question
Answer: Option C. -> Q=fr/BW
Answer: (c).Q=fr/BW
Question 43. Quality factor is also known as _________
  1.    Voltage magnification
  2.    Current magnification
  3.    Resistance magnification
  4.    Impedance magnification
 Discuss Question
Answer: Option A. -> Voltage magnification
Answer: (a).Voltage magnification
Question 44. At resonance condition, the voltage across the capacitor and inductor is _________ the source voltage.
  1.    Greater than
  2.    Less than
  3.    Equal to
  4.    Much less than
 Discuss Question
Answer: Option A. -> Greater than
Answer: (a).Greater than
Question 45. Find the source voltage when the voltage across the capacitor is 1000V and the Q factor is 10.
  1.    10V
  2.    200V
  3.    100V
  4.    90V
 Discuss Question
Answer: Option C. -> 100V
Answer: (c).100V
Question 46. What is the voltage across the inductor when the source voltage is 200V and the Q factor is 10?
  1.    100V
  2.    20V
  3.    2000V
  4.    0V
 Discuss Question
Answer: Option C. -> 2000V
Answer: (c).2000V
Question 47. What is the voltage across the capacitor when the source voltage is 100V and the Q factor is 10?
  1.    100V
  2.    10V
  3.    1000V
  4.    0V
 Discuss Question
Answer: Option C. -> 1000V
Answer: (c).1000V
Question 48. Find the Q factor when the voltage across the capacitor is 1000V and the source voltage is 100V.
  1.    10
  2.    20
  3.    30
  4.    40
 Discuss Question
Answer: Option A. -> 10
Answer: (a).10
Question 49. The maximum electrostatic energy stored in a capacitor at any instance is?
  1.    CVₘ²
  2.    1/2*CVₘ²
  3.    CVₘ
  4.    CVₘ/2
 Discuss Question
Answer: Option B. -> 1/2*CVₘ²
Answer: (b).1/2*CVₘ²
Question 50. Find the reactive power when the average power is 5W and Q=2.
  1.    10W
  2.    5W
  3.    2W
  4.    1W
 Discuss Question
Answer: Option A. -> 10W
Answer: (a).10W

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