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MCQs

Total Questions : 50 | Page 5 of 5 pages
Question 41. The value of VBE ___________
  1.    Depends upon IC to moderate extent
  2.    Is almost independent of IC
  3.    Is strongly dependant on IC
  4.    None of the above
 Discuss Question
Answer: Option B. -> Is almost independent of IC
Question 42. In the above question, what are the values of cut-off frequencies?
  1.    140 kHz , 60 kHz
  2.    1020 kHz , 980 kHz
  3.    1030 kHz , 970 kHz
  4.    None of the above
 Discuss Question
Answer: Option B. -> 1020 kHz , 980 kHz
Question 43. In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then ___________
  1.    XL decreases and XC increases
  2.    XL increases and XC decreases
  3.    Line current becomes minimum
  4.    None of the above
 Discuss Question
Answer: Option A. -> XL decreases and XC increases
Question 44. The base of a transistor is ___________ doped
  1.    heavily
  2.    moderately
  3.    lightly
  4.    none of the above
 Discuss Question
Answer: Option C. -> lightly
Question 45. Transistor biasing is generally provided by a ___________
  1.    Biasing circuit
  2.    Bias battery
  3.    Diode
  4.    None of the above
 Discuss Question
Answer: Option A. -> Biasing circuit
Question 46. At series or parallel resonance, the circuit power factor is ___________
  1.    0%
  2.    5%
  3.    10%
  4.    8%
 Discuss Question
Answer: Option C. -> 10%
Question 47. The power gain in a transistor connected in ___________ arrangement is the highest
  1.    common emitter
  2.    common base
  3.    common collector
  4.    none of the above
 Discuss Question
Answer: Option A. -> common emitter
Question 48. IC = [a / (1 - a )] IB + ___________
  1.    ICEO
  2.    ICBO
  3.    IC
  4.    (1 - a ) IB
 Discuss Question
Answer: Option A. -> ICEO
Question 49. If the value of collector current IC increases, then the value of VCE ___________
  1.    Remains the same
  2.    Decreases
  3.    Increases
  4.    None of the above
 Discuss Question
Answer: Option B. -> Decreases
Question 50. In a transistor amplifier circuit VCE = VCB + ___________
  1.    VBE
  2.    2 VBE
  3.    5 VBE
  4.    None of the above
 Discuss Question
Answer: Option A. -> VBE

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