Silicon Controlled Rectifier - SCR MCQ Questions and Answers Quiz

11. An SCR has three terminals viz ……………

  1. Cathode, anode, gate
  2. Anode, cathode, grid
  3. Anode, cathode, drain
  4. None of the above

12. 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

13. 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

14. In an SCR circuit the supply voltage is generally ……….. that of breakover voltage

  1. Equal to
  2. Less than
  3. Greater than
  4. None of the above

15. In an SCR circuit, the supply voltage is generally ......... that of breakover voltage

  1. Equal to
  2. Less than
  3. Greater than
  4. None of the above

16. When SCR is OFF, the current in the circuit is …………….

  1. Exactly zero
  2. Small leakage current
  3. Large leakage current
  4. None of the above

17. When SCR starts conducting, then …………… loses all control

  1. Gate
  2. Cathode
  3. Anode
  4. None of the above

18. An SCR is made of ………….

  1. Germanium
  2. Silicon
  3. Carbon
  4. None of the above

19. If gate current is increased, then anode-cathode voltage at which SCR closes …………….

  1. Is decreased
  2. Is increased
  3. Remains the same
  4. None of the above

20. If gate current is increased, then anode-cathode voltage at which SCR turns ON

  1. is decreased
  2. is increased
  3. remains the same
  4. none of the above
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