FET

11. A JFET is a driven device

  1. current
  2. voltage
  3. both current and voltage
  4. none of the above

Correct answer: (A)
current

12. A JFET is also called transistor

  1. unipolar
  2. bipolar
  3. unijunction
  4. none of the above

Correct answer: (A)
unipolar

13. A JFET is similar in operation to valve

  1. diode
  2. pentode
  3. triode
  4. tetrode

Correct answer: (B)
pentode

14. 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

Correct answer: (C)
positive as well as negative gate voltage

15. A MOSFET differs from a JFET mainly because _________

  1. of power rating
  2. the MOSFET has two gates
  3. the JFET has a pn junction
  4. none of the above

Correct answer: (C)
the JFET has a pn junction

16. A MOSFET is sometimes called JFET

  1. many gate
  2. open gate
  3. insulated gate
  4. shorted gate

Correct answer: (C)
insulated gate

17. A MOSFET uses the electric field of a to control the channel current

  1. capacitor
  2. battery
  3. generator
  4. none of the above

Correct answer: (A)
capacitor

18. A n-channel D-MOSFET with a positive VGS is operating in _________

  1. the depletion-mode
  2. the enhancement-mode
  3. cut off
  4. saturation

Correct answer: (B)
the enhancement-mode

19. as the lowest noise-level

  1. triode
  2. ordinary trnsistor
  3. tetrode
  4. JFET

Correct answer: (D)
JFET

20. At cut-off, the JFET channel is _________

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

Correct answer: (B)
completely closed by the depletion region

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