electronic-devices-pnpn Related Question Answers

1. How many terminals does a programmable unijunction transistor (PUT) have?





2. What is the typical value of the reverse resistance of SCRs?





3. The ISO-LIT Q1 16-pin Litronix opto-isolator DIP contains ________ opto-isolators.





4. How many terminals does a Shockley diode have?





5. What is the range of the variable resistor in the equivalent circuit of a unijunction transistor?





6. Which one of the SCR terminals fires the SCR?





7. Which of the following devices has the smallest turn-off time?





8. What is the range of the turn-on times in high-power SCR devices?





9. What is the frequency range of application of SCRs?





10. This symbol is an example of a(n) ________.





11. Which of the following devices has nearly the same turn-on time as turn-off time?





12. Which of the transistors of an SCR are conducting when the SCR is fired and is in the conduction mode?





13. For an SCS, a ________ pulse at the anode gate turns the device on, while a ________ pulse will turn it off.



14. An advantage of the SCR over the SCS is the reduced turn-off time.



15. This is an example of a high-isolation ________ gate.





16. Which of the following devices has (have) four layers of semiconductor materials?





17. Which of the following parameters are usually provided by the manufacturer on the specification sheet for SCRs?





18. What is the maximum current (rms) rating for commercially available LASCRs today?





19. Which of the following areas is (are) applications of an SCS?





20. How many terminals does a silicon-controlled switch (SCS) device have?





21. What is the typical value of the triggering anode gate for SCS devices?





22. What is the typical range of turn-off times for SCRs?





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





24. This symbol is an example of a(n)________.





25. Which of the following transistors is an SCR composed of?





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