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CuriousTab

Thyristors and Tranducers problems


  • 1. 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
  • 2. A transducer's function is to:

  • Options
  • A. transmit electrical energy
  • B. convert energy
  • C. produce mechanical energy
  • D. prevent current flow
  • Discuss
  • 3. 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
  • 4. The PUT (programmable unijunction transistor) is actually a type of:

  • Options
  • A. UJT thyristor
  • B. FET device
  • C. TRIAC
  • D. SCR
  • Discuss
  • 5. 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
  • 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. The silicon-controlled rectifier (SCR) is a three-layer device consisting of a gate, an anode, and a cathode.

  • Options
  • A. True
  • B. False
  • Discuss
  • 9. A transducer does not convert energy from one form to another.

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

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

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