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SCR (silicon controlled rectifier) MCQs
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Avg score: 50% • Most missed: “If firing angle in an SCR circuit is increased, the output ............”
SCR (silicon controlled rectifier) MCQs
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25 Questions

1. An SCR is turned off when ..............
2. The control element of an SCR is .............
3. In an SCR circuit the supply voltage is generally ........... that of breakover voltage
4. In the normal operation of an SCR, anode is ............... w.r.t. cathode
5. An SCR behaves as a ................ switch
6. An SCR is made of silicon and not germanium because silicon .........
7. An SCR combines the features of ..............
8. When SCR is OFF, the current in the circuit is ................
9. An SCR is sometimes called ............
10. We can control a.c. power in a load by connecting ............
11. An SCR is sometimes called ............
12. In normal operation of an SCR, gate is ...........w.r.t. cathode
13. An SCR is a .................... triggered device
14. An SCR has .............. semiconductor layers
15. An SCR is a solid state equivalent of ................
16. We can control a.c. power in a load by connecting ............
17. An SCR has ................. pn junctions
18. An SCR has three terminals viz ...............
19. An SCR is a solid state equivalent of ................
20. When an SCR is turned on, the voltage across it is about ..........
21. If firing angle in an SCR circuit is increased, the output ............
22. An SCR has three terminals viz ...............
23. The normal way to turn on a SCR is by .................
24. An SCR is made of .............
25. When SCR starts conducting, then ................ loses all control

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