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MCQs

Total Questions : 202 | Page 1 of 21 pages
Question 1. A UJT has ___________.
  1.    Two pn junctions
  2.    One pn junction
  3.    Three pn junctions
  4.    None of the above
 Discuss Question
Answer: Option B. -> One pn junction
Question 2. A diac has ___________ pn junctions
  1.    Four
  2.    Two
  3.    Three
  4.    None of the above
 Discuss Question
Answer: Option B. -> Two
Question 3. The UJT may be used as ___________.
  1.    Am amplifier
  2.    A sawtooth generator
  3.    A rectifier
  4.    None of the above
 Discuss Question
Answer: Option B. -> A sawtooth generator
Question 4. A diac has ___________ terminals.
  1.    Two
  2.    Three
  3.    Four
  4.    None of the above
 Discuss Question
Answer: Option A. -> Two
Question 5. A triac is a ___________ switch
  1.    Bidirectional
  2.    Unidirectional
  3.    Mechanical
  4.    None of the above
 Discuss Question
Answer: Option A. -> Bidirectional
Question 6. The normal way to turn on a diac is by ___________.
  1.    Gate current
  2.    Gate voltage
  3.    Breakover voltage
  4.    None of the above
 Discuss Question
Answer: Option C. -> Breakover voltage
Question 7. Which of the following is not a characteristic of UJT?
  1.    Intrinsic stand off ratio
  2.    Negative resistance
  3.    Peak-point voltage
  4.    Bilateral conduction
 Discuss Question
Answer: Option D. -> Bilateral conduction
Question 8. Between the peak point and the valley point of UJT emitter characteristics we have ___________ region
  1.    Saturation
  2.    Negative resistance
  3.    Cut-off
  4.    None of the above
 Discuss Question
Answer: Option B. -> Negative resistance
Question 9. After peak point, the UJT operates in the ___________ region.
  1.    Cut-off
  2.    Saturation
  3.    Negative resistance
  4.    None of the above
 Discuss Question
Answer: Option C. -> Negative resistance
Question 10. A triac can pass a portion of ___________ half-cycle through the load.
  1.    Only positive
  2.    Only negative
  3.    Both positive and negative
  4.    None of the above
 Discuss Question
Answer: Option C. -> Both positive and negative

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