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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.

The channel of a JFET is between the ___________

  1. A. gate and drain
  2. B. drain and source
  3. C. gate and source
  4. D. input and output
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A JFET is similar in operation to ___________ valve

  1. A. diode
  2. B. pentode
  3. C. triode
  4. D. tetrode
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In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers

  1. A. almost touch each other
  2. B. have large gap
  3. C. have moderate gap
  4. D. none of the above
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A MOSFET can be operated with ___________

  1. A. negative gate voltage only
  2. B. positive gate voltage only
  3. C. positive as well as negative gate voltage
  4. D. none of the above
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In class A operation, the input circuit of a JFET is ___________ biased

  1. A. forward
  2. B. reverse
  3. C. not
  4. D. none of the above
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The gate of a JFET is ___________ biased

  1. A. reverse
  2. B. forward
  3. C. reverse as well as forward
  4. D. none of the above
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A certain D-MOSFET is biased at VGS = 0 V. Its data sheet specifies IDSS = 20mA and VGS(off) = -5 V. The value of the drain current is ___________

  1. A. 20 mA
  2. B. 0 mA
  3. C. 40 mA
  4. D. 10 mA
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A certain common source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ___________

  1. A. the voltage gain will increase
  2. B. the transconductance will increase
  3. C. the voltage gain will decrease
  4. D. the Q-point will shift
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The input impedance of a MOSFET is of the order of ___________

  1. A. O
  2. B. a few hundred O
  3. C. kΩ
  4. D. several MO
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In a FET, there are ___________ pn junctions at the sides

  1. A. three
  2. B. four
  3. C. five
  4. D. two
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A CS JFET amplifier has a load resistance of 10 kΩ , R D = 820 V. If g m = 5 mS and V in = 500 mV, the output signal voltage is

  1. A. 2.05 V
  2. B. 25 V
  3. C. 0.5 V
  4. D. 1.89 V
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In a common source JFET amplifier, the output voltage is ___________.

  1. A. 180° out of phase with input
  2. B. In phase with input
  3. C. 90° out of phase with input
  4. D. None of the above
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