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SCR (Silicon Controlled Rectifiers)

Free 25+ SCR (Silicon Controlled Rectifiers) MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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SCR (Silicon Controlled Rectifiers) — MCQs for Pakistan government job tests

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SCR (Silicon Controlled Rectifiers)

Practice questions

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1.What is the approximate voltage drop across an SCR when it is in the conducting state?

2.What type of trigger does an SCR (Silicon Controlled Rectifier) respond to?

3.Why is silicon preferred over germanium in the construction of an SCR?

4.In an SCR circuit, how does the supply voltage typically compare to the breakover voltage?

5.What is the standard method to activate an SCR?

6.An SCR (Silicon Controlled Rectifier) integrates the characteristics of which two components?

7.How is an SCR (Silicon Controlled Rectifier) switched off?

8.Which part of an SCR functions as the control terminal?

9.During standard SCR functioning, what is the potential of the anode relative to the cathode?

10.What type of switch is an SCR classified as?

11.During standard functioning of an SCR, what is the potential of the gate relative to the cathode?

12.What is another name commonly used for an SCR?

13.An SCR functions as the solid-state counterpart to which of the following devices?

14.What are the three terminals of an SCR called?

15.What material is primarily used to manufacture an SCR?

16.How many semiconductor layers are present in an SCR?

17.How many pn junctions are present in a Silicon Controlled Rectifier (SCR)?

18.Under what condition does an SCR switch off?

19.How does increasing the gate current affect the anode-to-cathode voltage at which an SCR turns off?

20.In an SCR circuit, how can the conduction angle be adjusted?

How to prepare with SCR (Silicon Controlled Rectifiers) MCQs

  • Work through questions topic by topic, then revisit any you answered incorrectly.
  • Read explanations carefully—they often cover facts that repeat across PPSC, FPSC, and NTS papers.
  • Pair subject practice with past papers to see how SCR (Silicon Controlled Rectifiers) appears in real exam conditions.

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