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Home ‣ Electronics ‣ Thyristors and Tranducers Comments
  • Question

  • The only way to close an SCR is with:


  • Options
  • A. a trigger input applied to the gate
  • B. forward breakover voltage
  • C. low-current dropout
  • D. valley voltage

  • Correct Answer
  • forward breakover voltage 

    • Thyristors and Tranducers problems

    Search Results

    • 1. What does a hall effect sensor sense?

    • Options
    • A. temperature
    • B. moisture
    • C. magnetic fields
    • D. pressure
      • Discuss
    • 2. Once a DIAC is conducting, the only way to turn it off is with:

    • Options
    • A. a positive gate voltage
    • B. a negative gate voltage
    • C. low-current dropout
    • D. breakover
      • Discuss
    • 3. With a PNP circuit, the most positive voltage is probably:

    • Options
    • A. ground
    • B. VC
    • C. VBE
    • D. VCC
      • Discuss
    • 4. If an input signal ranges from 20?40 µA (microamps), with an output signal ranging from .5?1.5 mA (milliamps), what is the ac beta?

    • Options
    • A. 0.05
    • B. 20
    • C. 50
    • D. 500
      • Discuss
    • 5. Which is the higher gain provided by a C-E configuration?

    • Options
    • A. voltage
    • B. current
    • C. resistance
    • D. power
      • Discuss
    • 6. What type of application would use a photovoltaic cell?

    • Options
    • A. an automobile horn
    • B. a TI 92 calculator
    • C. a magnetic field detector
    • D. a remote power source
      • Discuss
    • 7. The DIAC is a:

    • Options
    • A. transistor
    • B. unidirectional device
    • C. three-layer device
    • D. bidirectional device
      • Discuss
    • 8. When checking a good SCR or TRIAC with an ohmmeter it will:

    • Options
    • A. show high resistance in both directions
    • B. show low resistance with positive on anode and negative on cathode, and high resistance when reversed
    • C. show high resistance with negative on anode and positive on cathode, and low resistance when reversed
    • D. show low resistance in both directions
      • Discuss
    • 9. Which is the seven-segment display?

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. What is an SCR?

    • Options
    • A. a PNPN thyristor with 3 terminals
    • B. a PNPN thyristor with 4 terminals
    • C. a PNP thyristor with 3 terminals
    • D. an NPN thyristor with 3 terminals
      • Discuss

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