Electronic Devices and Circuits MCQs with answers Page - 34

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A

Admin • 833.24K Points
Coach

Q. The base-emitter voltage is usually ?

  • (A) Less than the base supply voltage
  • (B) Equal to the base supply voltage
  • (C) More than the base supply voltage
  • (D) Cannot answer

A

Admin • 833.24K Points
Coach

Q. The fact that only a few holes are in the base region means the base is ?

  • (A) Lightly doped
  • (B) Heavily doped
  • (C) Undoped
  • (D) None of the above

A

Admin • 833.24K Points
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Q. Junction Field Effect Transistors (JFET) contain how many diodes ?

  • (A) 4
  • (B) 3
  • (C) 2
  • (D) 1

A

Admin • 833.24K Points
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Q. The JFET is a ?

  • (A) Unipolar device
  • (B) Tripolar device
  • (C) Bipolar device
  • (D) None of the above

A

Admin • 833.24K Points
Coach

Q. The JFETs are normally used in ?

  • (A) Cut-off region
  • (B) Saturation region
  • (C) Ohmic gate
  • (D) None of the above

A

Admin • 833.24K Points
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Q. Whenever a JFET operates above pinch-off voltage ?

  • (A) Drain current starts decreasing
  • (B) Drain current increases steeply
  • (C) Depletion regions become smaller
  • (D) Drain current remains nearly constant

A

Admin • 833.24K Points
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Q. A JFET can operate in ?

  • (A) Only depletion mode
  • (B) Only enhancement mode
  • (C) Both depletion and enhancement modes
  • (D) Neither depletion nor enhancement modes

A

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Q. Three terminals of a JFET are ?

  • (A) Pole, dipole and bipole
  • (B) Emitter, collector and base
  • (C) Source, drain and current
  • (D) Top, base and side

A

Admin • 833.24K Points
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Q. A FET differs from a bipolar transistor as it has ?

  • (A) Simpler fabrication
  • (B) Negative resistance
  • (C) High input impedance
  • (D) Any of the above

A

Admin • 833.24K Points
Coach

Q. The graph of current gain versus collector-current indicates that the current gain ?

  • (A) Is constant
  • (B) Varies slightly
  • (C) Varies significantly
  • (D) Equals the collector current divided by the base current

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