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Home ‣ Electronics ‣ Thyristors and Tranducers See What Others Are Saying!
  • 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.

    • More questions

    • 1. Typically the forward voltage on an LED is between _______ and ________.

    • Options
    • A. 1.5 V, 3.7 V
    • B. 0.7 V, 1.1 V
    • C. 1 V, 3 V
    • D. 1 V, 6 V
      • Discuss
    • 2. What is the difference between binary coding and binary coded decimal?

    • Options
    • A. Binary coding is pure binary.
    • B. BCD is pure binary.
    • C. Binary coding has a decimal format.
    • D. BCD has no decimal format.
      • Discuss
    • 3. The total power dissipated in a series resistive circuit exceeds the sum of the resistor powers.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. If a 7.5 kΩ resistance is connected to a 10 kΩ inductive reactance in a series RL circuit, then the impedance equals 12.5 kΩ .

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Ring and johnson counters are _______.

    • Options
    • A. asynchronous counters
    • B. synchronous counters
    • C. true binary counters
    • D. asynchronous and true binary counters
      • Discuss
    • 6. An inverting amplifier has a phase shift of 180° from input to output.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. 

      How long will it take the capacitor in the given circuit to discharge?


    • Options
    • A. 16.4 µs
    • B. 32.8 µs
    • C. 65.6 µs
    • D. 82 µs
      • Discuss
    • 8. 

      The secondary current is _____ in the given circuit.


    • Options
    • A. 1.9 mA
    • B. 7.5 mA
    • C. 30 mA
    • D. 60 mA
      • Discuss
    • 9. 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
    • 10. The modulus (mod) of a counter is the same as its maximum count (N).

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

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