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EE AND ECE - SCR (Silicon Controlled Rectifiers) MCQs
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EE AND ECE - SCR (Silicon Controlled Rectifiers) MCQs
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25 Questions

1. An SCR has …………….. pn junctions
2. An SCR has three terminals viz ……………
3. An SCR has …………….. pn junctions
4. When an SCR is turned on, the voltage across it is about ……….
5. The control element of an SCR is ………….
6. When SCR starts conducting, then ……………. loses all control
7. An SCR can exercise control over ………. of a.c. supply
8. An SCR can exercise control over ………. of a.c. supply
9. An SCR is made of ………….
10. When SCR starts conducting, then ……………. loses all control
11. In an SCR circuit, the angle of conduction can be changed by ……….
12. In normal operation of an SCR, gate is ………..w.r.t. cathode
13. In an SCR circuit the supply voltage is generally ……….. that of breakover voltage
14. An SCR combines the features of …………..
15. An SCR is made of ………….
16. An SCR behaves as a ……………. switch
17. When SCR is OFF, the current in the circuit is …………….
18. An SCR is turned off when …………..
19. An SCR combines the features of …………..
20. In an SCR circuit the supply voltage is generally ……….. that of breakover voltage
21. An SCR is sometimes called …………
22. We can control a.c. power in a load by connecting …………
23. If gate current is increased, then anode-cathode voltage at which SCR closes …………….
24. An SCR is a solid state equivalent of …………….
25. When an SCR is turned on, the voltage across it is about ……….

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