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MCQs

Total Questions : 81 | Page 5 of 9 pages
Question 41. A MOSFET can be operated with ___________
  1.    negative gate voltage only
  2.    positive gate voltage only
  3.    positive as well as negative gate voltage
  4.    none of the above
 Discuss Question
Answer: Option C. -> positive as well as negative gate voltage
Question 42. In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers
  1.    almost touch each other
  2.    have large gap
  3.    have moderate gap
  4.    none of the above
 Discuss Question
Answer: Option A. -> almost touch each other
Question 43. A JFET is similar in operation to ___________ valve
  1.    diode
  2.    pentode
  3.    triode
  4.    tetrode
 Discuss Question
Answer: Option B. -> pentode
Question 44. The channel of a JFET is between the ___________
  1.    gate and drain
  2.    drain and source
  3.    gate and source
  4.    input and output
 Discuss Question
Answer: Option B. -> drain and source
Question 45.  Junction Field Effect Transistors (JFET) contain how many diodes?
  1.    4
  2.    3
  3.    2
  4.    1
 Discuss Question
Answer: Option C. -> 2
Question 46.  D-MOSFETs are sometimes used in series to construct a cascode high-frequency amplifier to overcome the loss of:
  1.    low output impedance
  2.    capacitive reactance
  3.    high input impedance
  4.    inductive reactance
 Discuss Question
Answer: Option C. -> high input impedance
Question 47.  When not in use, MOSFET pins are kept at the same potential through the use of:
  1.    shipping foil
  2.    nonconductive foam
  3.    conductive foam
  4.    a wrist strap
 Discuss Question
Answer: Option C. -> conductive foam
Question 48.  When an input delta of 2 V produces a transconductance of 1.5 mS, what is the drain current delta?
  1.    666 mA
  2.    3 mA
  3.    0.75 mA
  4.    0.5 mA
 Discuss Question
Answer: Option B. -> 3 mA
Question 49.  In the constant-current region, how will the IDS change in an n-channel JFET?
  1.    As VGS decreases ID decreases.
  2.    As VGS increases ID increases.
  3.    As VGS decreases ID remains constant.
  4.    As VGS increases ID remains constant.
 Discuss Question
Answer: Option A. -> As VGS decreases ID decreases.
Question 50.  A "U" shaped, opposite-polarity material built near a JFET-channel center is called the:
  1.    gate
  2.    block
  3.    drain
  4.    heat sink
 Discuss Question
Answer: Option A. -> gate

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