FET

31. In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers _________

  1. almost touch each other
  2. have large gap
  3. have moderate gap
  4. none of the above

Correct answer: (A)
almost touch each other

32. In a p-channel JFET, the charge carriers are _________

  1. electrons
  2. holes
  3. both electrons and holes
  4. none of the above

Correct answer: (B)
holes

33. In class A operation, the input circuit of a JFET is biased

  1. forward
  2. reverse
  3. not
  4. none of the above

Correct answer: (B)
reverse

34. The channel of a JFET is between the _________

  1. gate and drain
  2. drain and source
  3. gate and source
  4. input and output

Correct answer: (B)
drain and source

35. The constant-current region of a JFET lies between

  1. cut off and saturation
  2. cut off and pinch-off
  3. o and IDSS
  4. pinch-off and breakdown

Correct answer: (D)
pinch-off and breakdown

36. The gate of a JFET is biased

  1. reverse
  2. forward
  3. reverse as well as forward
  4. none of the above

Correct answer: (A)
reverse

37. The gate voltage in a JFET at which drain current becomes zero is called voltage

  1. saturation
  2. pinch-off
  3. active
  4. cut-off

Correct answer: (B)
pinch-off

38. The input control parameter of a JFET is _________

  1. gate voltage
  2. source voltage
  3. drain voltage
  4. gate current

Correct answer: (A)
gate voltage

39. The input impedance of a JFET is that of an ordinary transistor

  1. equal to
  2. less than
  3. more than
  4. none of the above

Correct answer: (C)
more than

40. The input impedance of a MOSFET is of the order of _________

  1. 28
  2. O
  3. a few hundred O
  4. kO

Correct answer: (D)
kO

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