PNPN Questions with Answers Free Practice Test | Page 3

The PNPN structure forms the basis of semiconductor devices like SCRs and thyristors, making it a key topic in electronics aptitude exams. Questions related to PNPN are often included in aptitude questions and answers sections for GATE, ISRO, and PSU recruitment tests. Understanding its layer structure, operation, and switching characteristics helps you analyze semiconductor behavior effectively. This guide presents PNPN questions with answers and explanations designed for quick learning. Practicing these aptitude test practice online questions will strengthen your core knowledge in power electronics and improve your performance in technical exams.

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Q21

Which of the following is (are) the advantages of the SCS over a corresponding SCR?

A Reduced turn-off time
B Increased control and triggering sensitivity
C More predictable firing situation
D All of the above

Answer: Option D

Q22

Which of the following transistors is an SCR composed of?

A npn, pnp
B npn, npn
C pnp, pnp
D None of the above

Answer: Option A

Q23

Which of the following transistors is an SCR composed of?

A npn, pnp
B npn, npn
C pnp, pnp
D None of the above

Answer: Option A

Q24

How many layers of semiconductor materials does a silicon-controlled rectifier (SCR) have?

Answer: Option C

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PNPN Questions and Answers

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PNPN Questions and Answers

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