Electronic Devices and Circuits MCQs with answers Page - 11

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Q. A common-source amplifier is similar in configuration to which BJT amplifier?

  • (A) common-base
  • (B) common- collector
  • (C) common-emitter
  • (D) emitter- follower

A

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Q. When transistors are used in digital circuits they usually operate in the

  • (A) active region
  • (B) breakdown region
  • (C) saturation and cutoff regions
  • (D) linear region

A

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Q. Which of the following elements are important in determining the gain of the system in the high-frequency region?

  • (A) interelectrode capacitances
  • (B) wiring capacitances
  • (C) miller effect capacitance
  • (D) all of the above

A

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Q. For audio systems, the reference level is generally accepted as .

  • (A) 1 mw
  • (B) 1 w
  • (C) 10 mw
  • (D) 100 mw

A

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Q. What is the normalized gain expressed in dB for the cutoff frequencies?

  • (A) –3 db
  • (B) +3 db
  • (C) –6 db
  • (D) –20 db

A

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Q. Which of the following configurations does not involve the Miller effect capacitance?

  • (A) common-emitter
  • (B) common-base
  • (C) common- collector
  • (D) all of the above

A

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Q. A current ratio of IC/IE is usually less than one and is called

  • (A) omega
  • (B) beta
  • (C) theta
  • (D) alpha

A

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Q. A transistor may be used as a switching device or as a:

  • (A) tuning device
  • (B) rectifier
  • (C) fixed resistor
  • (D) variable resistor

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Q. Most of the electrons in the base of an NPN transistor flow:

  • (A) into the collector
  • (B) into the emitter
  • (C) out of the base lead
  • (D) into the base supply

A

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Q. The BJT is a device. The FET is a device.

  • (A) bipolar, bipolar
  • (B) bipolar, unipolar
  • (C) unipolar, bipolar
  • (D) unipolar, unipolar

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