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MCQs

Total Questions : 122 | Page 2 of 13 pages
Question 11. Double tuned circuits are used in ___________ stages of a radio receiver
  1.    IF
  2.    Audio
  3.    Output
  4.    None of the above
 Discuss Question
Answer: Option A. -> IF
Question 12. When the temperature changes, the operating point is shifted due to .
  1.    Change in ICBO
  2.    Change in VCC
  3.    Change in the values of circuit resistance
  4.    None of the above
 Discuss Question
Answer: Option A. -> Change in ICBO
Question 13. BC 147 transistor indicates that it is made of ___________
  1.    germanium
  2.    silicon
  3.    carbon
  4.    none of the above
 Discuss Question
Answer: Option B. -> silicon
Question 14. In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of ß is ___________
  1.    100
  2.    50
  3.    about 1
  4.    200
 Discuss Question
Answer: Option D. -> 200
Question 15. If the value of a is 0.9, then value of ß is ___________
  1.    9
  2.    0.9
  3.    900
  4.    90
 Discuss Question
Answer: Option D. -> 90
Question 16. The disadvantage of base resistor method of transistor biasing is that it ___________
  1.    Is complicated
  2.    Is sensitive to changes in ß
  3.    Provides high stability
  4.    None of the above
 Discuss Question
Answer: Option B. -> Is sensitive to changes in ß
Question 17. The dimensions of L/CR are that of ___________
  1.    Farad
  2.    Henry
  3.    Ohm
  4.    None of the above
 Discuss Question
Answer: Option C. -> Ohm
Question 18. IC = [a / (1 - a )] IB + [ / (1 - a )]
  1.    ICBO
  2.    ICEO
  3.    IC
  4.    IE
 Discuss Question
Answer: Option A. -> ICBO
Question 19. In a transistor, the base current is about ___________ of emitter current
  1.    25%
  2.    20%
  3.    35%
  4.    5%
 Discuss Question
Answer: Option D. -> 5%
Question 20. At series resonance, voltage across L is ___________ voltage across C
  1.    Equal to but opposite in phase to
  2.    Equal to but in phase with
  3.    Greater than but in phase with
  4.    Less than but in phase with
 Discuss Question
Answer: Option A. -> Equal to but opposite in phase to

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