PNPN Questions and Answers

Practice Mode
Showing 10 of 24 questions
Q1
Which of the following devices does not have a cathode terminal?
  • A SCR
  • B SCS
  • C Triac
  • D Shockley diode
Answer: Option C
Q2
Today, the SCR is more widely used than the TRIAC.
  • A TRUE
  • B FALSE
Answer: Option B
Q3
Which of the following devices is unquestionably of the greatest interest today?
  • A SCR
  • B GTO
  • C LASCR
  • D SCS
Answer: Option A
Q4
Which of the following devices has a negative-resistance region in its characteristics curve?
  • A SCR
  • B SCS
  • C Unijunction transistor
  • D Phototransistor
Answer: Option C
Q5
How many terminals does a programmable unijunction transistor (PUT) have?
  • A 4
  • B 3
  • C 2
  • D 1
Answer: Option B
Q6
The ISO-LIT Q1 16-pin Litronix opto-isolator DIP contains ________ opto-isolators.
  • A 4
  • B 8
  • C 12
  • D 6
Answer: Option A
Q7
How many terminals does a Shockley diode have?
  • A 5
  • B 4
  • C 3
  • D 2
Answer: Option D
Q8
Which one of the SCR terminals fires the SCR?
  • A Anode
  • B Cathode
  • C Gate
  • D All of the above
Answer: Option C
Q9
Which of the following devices has the smallest turn-off time?
  • A SCR
  • B GTO
  • C SCS
  • D LASCR
Answer: Option B
Q10
What is the frequency range of application of SCRs?
  • A About 10 kHz
  • B About 50 kHz
  • C About 250 kHz
  • D About 1 mHz
Answer: Option B

📚 More from Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Electronics
Back to Electronics
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test