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Home ‣ Electronics ‣ Thyristors and Tranducers Comments
  • Question

  • What causes the piezoelectric effect?


  • Options
  • A. heat or dissimilar metals
  • B. pressure on a crystal
  • C. water running on iron
  • D. a magnetic field

  • Correct Answer
  • pressure on a crystal 

    • Thyristors and Tranducers problems

    Search Results

    • 1. The PUT (programmable unijunction transistor) is actually a type of:

    • Options
    • A. UJT thyristor
    • B. FET device
    • C. TRIAC
    • D. SCR
      • Discuss
    • 2. The smallest amount of current that the cathode-anode can have, and still sustain conduction of an SCR is called the:

    • Options
    • A. maximum forward current
    • B. maximum forward gate current
    • C. holding current
    • D. reverse gate leakage current
      • Discuss
    • 3. A transducer's function is to:

    • Options
    • A. transmit electrical energy
    • B. convert energy
    • C. produce mechanical energy
    • D. prevent current flow
      • Discuss
    • 4. A UJT has:

    • Options
    • A. two base leads
    • B. one emitter lead
    • C. two emitter leads and one base lead
    • D. one emitter lead and two base leads
      • Discuss
    • 5. A TRIAC:

    • Options
    • A. can trigger only on positive gate voltages
    • B. can trigger only on negative gate voltages
    • C. cannot be triggered with gate voltages
    • D. can be triggered by either a positive or a negative gate voltage
      • Discuss
    • 6. What type of application would use an injection laser diode?

    • Options
    • A. a 10BASE-T Ethernet
    • B. a liquid crystal display
    • C. a fiber optic transmission line
    • D. a good flashlight
      • Discuss
    • 7. Which is the TRIAC?

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. 3428 is the decimal value for which of the following binary coded decimal (BCD) groupings?

    • Options
    • A. 11010001001000
    • B. 11010000101000
    • C. 011010010000010
    • D. 110100001101010
      • Discuss
    • 9. What is the decimal value of the hexadecimal number 777?

    • Options
    • A. 191
    • B. 1911
    • C. 19
    • D. 19111
      • Discuss
    • 10. Convert the binary number 1001.0010 to decimal.

    • Options
    • A. 125
    • B. 12.5
    • C. 90.125
    • D. 9.125
      • Discuss

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