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MCQs

Analog Electronics

Total Questions : 482 | Page 5 of 49 pages
Question 41. The action of jfet in its equivalent circuit can best be represented as a
  1.     Current controlled Current source
  2.     Current controlled voltage source
  3.     Voltage controlled voltage source
  4.     voltage controlled current source
 Discuss Question
Answer: Option D. ->  voltage controlled current source
Question 42. If=0.98, ico=6µa and iβ=100µa for a transistor,then the value of ic will be
  1.     2.3mA
  2.     3.2mA
  3.     4.6mA
  4.     5.2mA
 Discuss Question
Answer: Option D. ->  5.2mA
Explanation :
Question 43. If=0.98, ico=6µa and iβ=100µa for a transistor,then the value of ic will be
  1.     2.3mA
  2.     3.2mA
  3.     4.6mA
  4.     5.2mA
 Discuss Question
Answer: Option D. ->  5.2mA
Explanation :
Question 44. If=0.98, ico=6µa and iβ=100µa for a transistor,then the value of ic will be
  1.     2.3mA
  2.     3.2mA
  3.     4.6mA
  4.     5.2mA
 Discuss Question
Answer: Option D. ->  5.2mA
Explanation :
Question 45. An n- channel jfet has idss=2ma,and vp=-4v.its transconductance gm=in ma/v)for an applied gate to source voltage vgs=-2v is
  1.     0.25
  2.     0.5
  3.     0.75
  4.     1
 Discuss Question
Answer: Option B. ->  0.5
Question 46. The horizontal intercept of dc load line is the same as ideal
  1.     Cut off point
  2.     Saturation point
  3.     Operating point
  4.     Quasi saturation point
 Discuss Question
Answer: Option A. ->  Cut off point
Question 47. A differential amplifier is invariably used in the i/p stage of all op-amps.this is dome basically to provide the op-amps with a very high
  1.     CMRR
  2.     Bandwidth
  3.     Slew rate
  4.     Open-loop gain
 Discuss Question
Answer: Option A. ->  CMRR
Question 48. In an op-amp differentiator
  1.     The amplitude of output is proportional to rate of change of input
  2.     The amplitude of output is proportional to input
  3.     Output occurs when input is finite and constant
  4.     Polarity of input and output is the same
 Discuss Question
Answer: Option A. ->  The amplitude of output is proportional to rate of change of input
Question 49. Which of the following statements is false?
  1.     Push pull signals are equal and opposite in phase
  2.     Class AB operation cannot be used for a push pull audio power output phase
  3.     A push pull output transformer has a centre-tapped primary
  4.     All of the above
 Discuss Question
Answer: Option B. ->  Class AB operation cannot be used for a push pull audio power output phase
Question 50. In deriving ac equivalent circuit for an amplifier circuit we short circuit
  1.     All resistors
  2.     All transistors
  3.     All inductors
  4.     All capacitors
 Discuss Question
Answer: Option D. ->  All capacitors

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