21. A crystal diode utilises ___________ characteristic for rectification A. reverse B. forward C. forward or reverse D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
22. The ripple factor of a half-wave rectifier is ___________ A. 2 B. 1.21 C. 2.5 D. 0.48 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
23. The maximum efficiency of a half-wave rectifier is ___________ A. 40.6% B. 81.2% C. 50% D. 25% Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
24. The most widely used rectifier is ___________ A. half-wave rectifier B. centre-tap full-wave rectifier C. bridge full-wave rectifier D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
25. A zener diode has ___________ A. one pn junction B. two pn junctions C. three pn junctions D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
26. If the doping level in a crystal diode is increased, the width of depletion layer___________ A. remains the same B. is decreased C. in increased D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
27. A series resistance is connected in the zener circuit to___________ A. properly reverse bias the zener B. protect the zener C. properly forward bias the zener D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
28. The forward voltage drop across a silicon diode is about ___________ A. 2.5 V B. 3 V C. 10 V D. 0.7 V Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
29. The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ___________ A. 1 : 1 B. 100 : 1 C. 1000 : 1 D. 40000 : 1 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
30. The PIV rating of a crystal diode is ___________ that of equivalent vacuum diode A. the same as B. lower than C. more than D. none of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board