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Electrical Engineering

FetField Effect Transistors MCQs

Practice FetField Effect Transistors MCQs for competitive exams.

FetField Effect Transistors MCQs

Practice questions from this topic.

A MOSFET is sometimes called ___________ JFET

  1. A. many gate
  2. B. open gate
  3. C. insulated gate
  4. D. shorted gate
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In a JFET, IDSS is known as ___________

  1. A. drain to source current
  2. B. drain to source current with gate shorted
  3. C. drain to source current with gate open
  4. D. none of the above
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The two important advantages of a JFET are ___________

  1. A. high input impedance and square-law property
  2. B. inexpensive and high output impedance
  3. C. low input impedance and high output impedance
  4. D. none of the above
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The pinch-off voltage of a JFET is about ___________

  1. A. 5 V
  2. B. 0.6 V
  3. C. 15 V
  4. D. 25 V
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In a p-channel JFET, the charge carriers are ___________

  1. A. electrons
  2. B. holes
  3. C. both electrons and holes
  4. D. none of the above
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The transconductance of a JFET ranges from ___________

  1. A. 100 to 500 mA/V
  2. B. 500 to 1000 mA/V
  3. C. 0.5 to 30 mA/V
  4. D. above 1000 mA/V
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Which of the following devices has the highest input impedance?

  1. A. JFET
  2. B. MOSFET
  3. C. Crystal diode
  4. D. ordinary transistor
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___________ has the lowest noise-level

  1. A. triode
  2. B. ordinary trnsistor
  3. C. tetrode
  4. D. JFET
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A n-channel D-MOSFET with a positive VGS is operating in ___________

  1. A. the depletion-mode
  2. B. the enhancement-mode
  3. C. cut off
  4. D. saturation
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When drain voltage equals the pinch-off-voltage, then drain current ___________ with the increase in drain voltage

  1. A. decreases
  2. B. increases
  3. C. remains constant
  4. D. none of the above
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For VGS = 0 V, the drain current becomes constant when VDS exceeds

  1. A. cut off
  2. B. VDD
  3. C. VP
  4. D. o V
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At cut-off, the JFET channel is ___________

  1. A. at its widest point
  2. B. completely closed by the depletion region
  3. C. extremely narrow
  4. D. reverse baised
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