FET MCQ – Top 10 Field Effect Transistor Multiple Choice Questions

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Electrical Engineering MCQ Questions on FET.

Top 10 FET MCQ with answers

Which of following terminal represents the control input of a FET

Which of following terminal represents the control input of a FET:

  1. Gate
  2. Drain
  3. Source
  4. Collector

Correct answer: 1. Gate

Which types of devices are FETs

FETs are best described as:

  1. Unipolar
  2. Bipolar
  3. Tripolar

Correct answer: 1. Unipolar

FETs are unipolar devices because they operate only with one type of charge carrier.

FET is voltage-controlled device or current controlled devices

FET is a ___________ controlled device:

  1. Current
  2. Voltage

Correct answer: 2. Voltage

Generally FETs are preferred for which type of applications

Generally FETs are preferred for which type of applications:

  1. Amplification
  2. Switching
  3. Both of these
  4. None of these

Correct answer: 2. Switching

Generally FETs are preferred in switching applications because they are fasted than BJTs.

The gate-source PN junction of a JFET is always operated with the reverse-biased

The gate-source PN junction of a JFET is always operated with the reverse-biased:

  1. True
  2. False

Correct answer: 1. True

In JFET when does the drain current becomes constant

In JFET, for VGS = 0 V, the drain current becomes constant when VDS

  1. Is Zero
  2. Exceeds pinchoff voltage
  3. Is in ohmic region
  4. Enters breakdown region

Correct answer: 2. Exceeds pinchoff voltage

What is IDSS in JFET

IDSS is:

  1. Maximum possible drain current
  2. Drain current at cutoff
  3. Drain current when source is shorted
  4. None of these

Correct answer: 1. Maximum possible drain current

IGBT is recommended for which type of applications

Generally IGBT is recomended for which type of applications:

  1. Low voltage
  2. High voltage

Correct answer: 2. High voltage

Which type of VDD is required by p-channel JFET

The p-channel JFET requires:

  1. Negative VDD
  2. Positive VDD

Correct answer: 1. Negative VDD

JFET Bias in Ohmic region

To bias a JFET in the ohmic region:

  1. ID must be much smaller than IDSS
  2. ID must be much larger than IDSS
  3. ID must be much four times higher than IDSS

Correct answer: 1. ID must be much smaller than IDSS

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