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MCQs

Total Questions : 81 | Page 7 of 9 pages
Question 61. . When VGS = 0 V, a JFET is:
  1.    saturated
  2.    an analog device
  3.    an open switch
  4.    cut off
 Discuss Question
Answer: Option A. -> saturated
Question 62. . How will electrons flow through a p-channel JFET?
  1.    from source to drain
  2.    from source to gate
  3.    from drain to gate
  4.    from drain to source
 Discuss Question
Answer: Option D. -> from drain to source
Question 63. . When is a vertical channel E-MOSFET used?
  1.    for high frequencies
  2.    for high voltages
  3.    for high currents
  4.    for high resistances
 Discuss Question
Answer: Option C. -> for high currents
Question 64. . When applied input voltage varies the resistance of a channel, the result is called:
  1.    saturization
  2.    polarization
  3.    cutoff
  4.    field effect
 Discuss Question
Answer: Option D. -> field effect
Question 65. . When the JFET is no longer able to control the current, this point is called the:
  1.    breakdown region
  2.    depletion region
  3.    saturation point
  4.    pinch-off region
 Discuss Question
Answer: Option A. -> breakdown region
Question 66. . With a JFET, a ratio of output current change against an input voltage change is called:
  1.    transconductance
  2.    siemens
  3.    resistivity
  4.    gain
 Discuss Question
Answer: Option A. -> transconductance
Question 67. . The common-source JFET amplifier has:
  1.    a very high input impedance and a relatively low voltage gain
  2.    a high input impedance and a very high voltage gain
  3.    a high input impedance and a voltage gain less than 1
  4.    no voltage gain
 Discuss Question
Answer: Option A. -> a very high input impedance and a relatively low voltage gain
Question 68. . The overall input capacitance of a dual-gate D-MOSFET is lower because the devices are usually connected:
  1.    in parallel
  2.    with separate insulation
  3.    with separate inputs
  4.    in series
 Discuss Question
Answer: Option D. -> in series
Question 69. . The type of bias most often used with E-MOSFET circuits is:
  1.    constant current
  2.    drain-feedback
  3.    voltage-divider
  4.    zero biasing
 Discuss Question
Answer: Option B. -> drain-feedback
Question 70. . Which type of JFET bias requires a negative supply voltage?
  1.    feedback
  2.    source
  3.    gate
  4.    voltage divider
 Discuss Question
Answer: Option C. -> gate

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