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Home ‣ Electronics ‣ Thyristors and Tranducers Comments
  • Question

  • The silicon-controlled rectifier (SCR) is a three-layer device consisting of a gate, an anode, and a cathode.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    Explanation
    A silicon-controlled rectifier (or semiconductor-controlled rectifier) is a four-layer solid state device that controls current. The name "silicon controlled rectifier" or SCR is General Electric's trade name for a type of thyristor. The SCR was developed by a team of power engineers led by Gordon Hall and commercialized by Frank W. "Bill" Gutzwiller in 1957.

    • Thyristors and Tranducers problems

    Search Results

    • 1. The input resistance of the base of an emitter-follower is usually _________.

    • Options
    • A. very low
    • B. very high
    • C. shorted to ground
    • D. open
      • Discuss
    • 2. The phase difference between the input and output ac voltage signals of a common-emitter amplifier is __________.

    • Options
    • A. 0º
    • B. 90º
    • C. 180º
    • D. 360º
      • Discuss
    • 3. VCE approximately equals ________ when a transistor switch is cut off.

    • Options
    • A. VCC
    • B. VB
    • C. 0.2 V
    • D. 0.7 V
      • Discuss
    • 4. 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
    • 5. VCE approximately equals ________ when a transistor switch is in saturation.

    • Options
    • A. VC
    • B. VB
    • C. 0.3 V
    • D. 0.7 V
      • Discuss
    • 6. A transducer does not convert energy from one form to another.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A TRIAC can be triggered or activated by either a positive or a negative input gate trigger.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. A TRIAC will control AC voltage during the positive half cycle only.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The DIAC conducts in only one direction when gated on.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A photodiode is a device that produces light.

    • Options
    • A. True
    • B. False
      • Discuss

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