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Home ‣ Electronics ‣ Bipolar Junction Transistors (BJT) Comments
  • Question

  • Base bias provides _________.


  • Options
  • A. a very stable Q point
  • B. a very unstable Q point
  • C. no current gain
  • D. zero current in the base and collector circuits

  • Correct Answer
  • a very unstable Q point 

    • Bipolar Junction Transistors (BJT) problems

    Search Results

    • 1. When troubleshooting a bipolar junction transistor using an ohmmeter, if one of the junctions reads low in both directions, the junction is shorted and the transistor is bad. If one of the junctions reads high in both directions, the junction is shorted and the transistor is good.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. In a BJT, the collector current is approximately equal to the base current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The voltage measured from the collector to the emitter is the sum of the base-emitter voltage plus the collector-base voltage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. This is a PNP transistor.


    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The voltage gain of a transistor is inversely proportional to the change in output current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The signal voltage gain of an amplifier, AV, is defined as __________.

    • Options
    • A.
    • B. AV = IC x RC
    • C.
    • D.
      • Discuss
    • 7. The input resistance, Rin of a common-collector amplifier, consists of ____________.

    • Options
    • A. Rin = RE × AC Current Gain
    • B.
    • C. Rin = RE × ɑ
    • D. none of the above
      • Discuss
    • 8. VCE approximately equals ________ when a transistor switch is in saturation.

    • Options
    • A. VC
    • B. VB
    • C. 0.3 V
    • D. 0.7 V
      • Discuss
    • 9. An emitter-follower has a voltage gain that is __________.

    • Options
    • A. much less than one
    • B. approximately equal to one
    • C. greater than one
    • D. zero
      • Discuss
    • 10. VCE approximately equals ________ when a transistor switch is cut off.

    • Options
    • A. VCC
    • B. VB
    • C. 0.2 V
    • D. 0.7 V
      • Discuss

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