1. The diode has
2. . A crystal diode has forward resistance of the order of ……………
3. If the arrow of crystal diode symbol is positive w.r.t. bar, then diodeis ………….. biased.
4. The reverse current in a diode is of the order of ……………….
5. The forward voltage drop across a silicon diode is about …………………
6. A crystal diode is used as ……………
7. The d.c. resistance of a crystal diode is ………….. its a.c. resistancethe
8. An ideal crystal diode is one which behaves as a perfect ……….. when forward biased.
9. The ratio of reverse resistance and forward resistance of agermanium crystal diode is about ………….
10. The leakage current in a crystal diode is due to …………….
11. If the temperature of a crystal diode increases, then leakagecurrent ………..
12. The PIV rating of a crystal diode is ………….. that of equivalent vacuum diode
13. If the doping level of a crystal diode is increased, the breakdown voltage………….
14. The knee voltage of a crystal diode is approximately equal to ………….
15. When the graph between current through and voltage across a device is a straight line, the device is referred to as ……………….
16. When the crystal current diode current is large, the bias is …………
17. A crystal diode is a …………… device
18. A crystal diode utilises …………….. characteristic for rectification
19. When a crystal diode is used as a rectifier, the most important consideration is ………..
20. If the doping level in a crystal diode is increased, the width of depletion layer………..
21. A zener diode has ………..
22. A zener diode is used as …………….
23. The doping level in a zener diode is ……………that of a crystal diode
24. A zener diode is always ………… connected.
25. A zener diode utilizes ……….. characteristics for its operation.
26. In the breakdown region, a zener didoe behaves like a ……………source.
27. A zener diode is destroyed if it…………..
28. A series resistance is connected in the zener circuit to………..
29. A zener diode is …………………. device
30. A zener diode has ………….. breakdown voltage
31. ……………. rectifier has the lowest forward resistance
32. Mains a.c. power is converrted into d.c. power for …………….
33. The disadvantage of a half-wave rectifier is that the……………….
34. If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2volts, then diode PIV rating is ………………….
35. The ripple factor of a half-wave rectifier is …………………
36. There is a need of transformer for ………………..
37. The PIV rating of each diode in a bridge rectifier is ………………that of the equivalent centre-tap rectifier
38. For the same secondary voltage, the output voltage from a centre tap rectifier is ………… than that of bridge rectifier
39. If the PIV rating of a diode is exceeded, ………………
40. A 10 V power supply would use …………………. as filter capacitor.
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