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MCQs

Total Questions : 50 | Page 4 of 5 pages
Question 31. The biasing circuit has a stability factor of 50
  1.    100 µA
  2.    25 µA
  3.    20 µA
  4.    50 µA
 Discuss Question
Answer: Option D. -> 50 µA
Question 32. Tuned class C amplifiers are used for RF signals of ___________
  1.    Low power
  2.    High power
  3.    Very high power
  4.    None of the above
 Discuss Question
Answer: Option D. -> None of the above
Question 33. The Q of an LC circuit is given by ___________
  1.    2pfr x R
  2.    R / 2pfrL
  3.    2pfrL / R
  4.    R2/2pfrL
 Discuss Question
Answer: Option C. -> 2pfrL / R
Question 34. A silicon transistor is biased with base resistor method
  1.    105 kΩ
  2.    530 kΩ
  3.    315 kΩ
  4.    None of the above
 Discuss Question
Answer: Option B. -> 530 kΩ
Question 35. The input impedance of a transistor connected in ___________ arrangement is the highest
  1.    common emitter
  2.    common collector
  3.    common base
  4.    none of the above
 Discuss Question
Answer: Option B. -> common collector
Question 36. The voltage gain of a transistor connected in common collector arrangement is ___________
  1.    equal to 1
  2.    more than 10
  3.    more than 100
  4.    less than 1
 Discuss Question
Answer: Option D. -> less than 1
Question 37. The phase difference between the input and output voltages of a transistor connected in common collector arrangement is ___________
  1.    0°
  2.    90°
  3.    180°
  4.    270°
 Discuss Question
Answer: Option A. -> 0°
Question 38. Frequencies above ___________ kHz are called radio frequencies
  1.    2
  2.    10
  3.    50
  4.    200
 Discuss Question
Answer: Option D. -> 200
Question 39. The phase difference between the input and output voltages in a common base arrangement is ___________
  1.    0°
  2.    90°
  3.    270°
  4.    180°
 Discuss Question
Answer: Option A. -> 0°
Question 40. If the temperature increases, the value of VCE ___________
  1.    Remains the same
  2.    Is increased
  3.    Is decreased
  4.    None of the above
 Discuss Question
Answer: Option C. -> Is decreased

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