Electronic Devices-PNPN Question and Answer

Electronic Devices-PNPN Question and Answer
1. Which of the following devices does not have a cathode terminal?
  • SCR
  • SCS
  • Triac
  • Shockley diode
Show Answer
2. Today, the SCR is more widely used than the TRIAC.
  • TRUE
  • FALSE
Show Answer
3. Which of the following devices is unquestionably of the greatest interest today?
  • SCR
  • GTO
  • LASCR
  • SCS
Show Answer
4. Which of the following devices has a negative-resistance region in its characteristics curve?
  • SCR
  • SCS
  • Unijunction transistor
  • Phototransistor
Show Answer
5. How many terminals does a programmable unijunction transistor (PUT) have?
  • 4
  • 3
  • 2
  • 1
Show Answer
6. The ISO-LIT Q1 16-pin Litronix opto-isolator DIP contains ________ opto-isolators.
  • 4
  • 8
  • 12
  • 6
Show Answer
7. How many terminals does a Shockley diode have?
  • 5
  • 4
  • 3
  • 2
Show Answer
8. Which one of the SCR terminals fires the SCR?
  • Anode
  • Cathode
  • Gate
  • All of the above
Show Answer
9. Which of the following devices has the smallest turn-off time?
  • SCR
  • GTO
  • SCS
  • LASCR
Show Answer
10. What is the frequency range of application of SCRs?
  • About 10 kHz
  • About 50 kHz
  • About 250 kHz
  • About 1 mHz
Show Answer
Electronics
Questions and Answers for Competitive Exams Various Entrance Test