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MCQs

Total Questions : 202 | Page 2 of 21 pages
Question 11. To turn on UJT, the forward bias on the emitter diode should be ___________ the peak point voltage.
  1.    Less than
  2.    Equal to
  3.    More than
  4.    None of the above
 Discuss Question
Answer: Option C. -> More than
Question 12. A diac is turned on by ___________.
  1.    A breakover voltage
  2.    Gate voltage
  3.    Gate current
  4.    None of the above
 Discuss Question
Answer: Option A. -> A breakover voltage
Question 13. A UJT is sometimes called ___________ diode.
  1.    Low resistance
  2.    High resistance
  3.    Single-base
  4.    Double-base
 Discuss Question
Answer: Option D. -> Double-base
Question 14. When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.
  1.    High
  2.    Low
  3.    Extremely low
  4.    None of the above
 Discuss Question
Answer: Option A. -> High
Question 15. The device that exhibits negative resistance region is ___________.
  1.    Diac
  2.    Triac
  3.    Transistor
  4.    UJT
 Discuss Question
Answer: Option D. -> UJT
Question 16. When the temperature increases, the intrinsic stand off ratio ___________.
  1.    Increases
  2.    Decreases
  3.    Essentially remains the same
  4.    None of the above
 Discuss Question
Answer: Option C. -> Essentially remains the same
Question 17. The device that does not have the gate terminal is ___________.
  1.    Triac
  2.    FET
  3.    SCR
  4.    Diac
 Discuss Question
Answer: Option D. -> Diac
Question 18. In a UJT, the p-type emitter is ___________ doped
  1.    Lightly
  2.    Heavily
  3.    Moderately
  4.    None of the above
 Discuss Question
Answer: Option B. -> Heavily
Question 19. The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant
  1.    Transistor
  2.    SCR
  3.    UJT
  4.    none of the above
 Discuss Question
Answer: Option B. -> SCR
Question 20. A Triac has three terminals viz ___________
  1.    Drain, source, gate
  2.    Two main terminal and a gate terminal
  3.    Cathode, anode, gate
  4.    None of the above
 Discuss Question
Answer: Option B. -> Two main terminal and a gate terminal

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