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MCQs

Total Questions : 25 | Page 1 of 3 pages
Question 1. An SCR is made of ___________
  1.    Germanium
  2.    Silicon
  3.    Carbon
  4.    None of the above
 Discuss Question
Answer: Option B. -> Silicon
Question 2. When SCR starts conducting, then ___________ loses all control
  1.    Gate
  2.    Cathode
  3.    Anode
  4.    None of the above
 Discuss Question
Answer: Option A. -> Gate
Question 3. An SCR is a ___________ triggered device
  1.    Voltage
  2.    Current
  3.    Voltage as well as current
  4.    None of the above
 Discuss Question
Answer: Option B. -> Current
Question 4. An SCR can exercise control over ___________ of a.c. supply
  1.    Positive half-cycles only
  2.    Negative half-cycles only
  3.    Both positive and negative half-cycles
  4.    Positive or negative half-cycles
 Discuss Question
Answer: Option D. -> Positive or negative half-cycles
Question 5. In the normal operation of an SCR, anode is ___________ w.r.t. cathode
  1.    At zero potential
  2.    Negative
  3.    Positive
  4.    None of the above
 Discuss Question
Answer: Option C. -> Positive
Question 6. An SCR has ___________ pn junctions
  1.    Two
  2.    Three
  3.    Four
  4.    None of the above
 Discuss Question
Answer: Option B. -> Three
Question 7. In normal operation of an SCR, gate is ___________w.r.t. cathode
  1.    Positive
  2.    Negative
  3.    At zero potential
  4.    None of the above
 Discuss Question
Answer: Option A. -> Positive
Question 8. An SCR behaves as a ___________ switch
  1.    Unidirectional
  2.    Bidirectional
  3.    Mechanical
  4.    None of the above
 Discuss Question
Answer: Option A. -> Unidirectional
Question 9. An SCR is a solid state equivalent of ___________
  1.    Triode
  2.    Pentode
  3.    Gas-filled triode
  4.    Tetrode
 Discuss Question
Answer: Option C. -> Gas-filled triode
Question 10. In an SCR circuit, the angle of conduction can be changed by ___________
  1.    Changing anode voltage
  2.    Changing gate voltage
  3.    Reverse biasing the gate
  4.    None of the above
 Discuss Question
Answer: Option B. -> Changing gate voltage

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