Semiconductor Diode Quiz | Semiconductor Diode Objective Type Questions and Answers
Questions
21
Mains a.c. power is converrted into d.c. power for ……………..
Answer: using in electronic equipment
22
The disadvantage of a half-wave rectifier is that the……………….
Answer: output is difficult to filter
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23
If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is ………………….
Answer: 400 V
24
There is a need of transformer for ………………..
Answer: centre-tap full-wave rectifier
25
For the same secondary voltage, the output voltage from a centre-tap rectifier is ………… than that of bridge rectifier
Answer: One-Half
26
If the PIV rating of a diode is exceeded, ………………
Answer: the diode is destroyed
27
In the p & n regions of the p-n junction the _________ & the ___________ are the majority charge carriers respectively.
Answer: holes, electrons
28
When a physical contact between a p-region & n-region is established which of the following is most likely to take place?
Answer: Both of the above mentioned statements are true
29
Which of the following is true in case of an unbiased p-n junction diode?
Answer: Charges establish an electric field across the junctions
30
Which of the following is true in case of a forward biased p-n junction diode?
Answer: The positive terminal of the battery sucks electrons from the p-region
31
If the arrow of crystal diode symbol is positive w.r.t. bar, then diode is ………….. biased.
Answer: Forward
33
The forward voltage drop across a silicon diode is about …………………
Answer: 0.7 V
34
The d.c. resistance of a crystal diode is ………….. its a.c. resistance
Answer: Less Than
35
If the temperature of a crystal diode increases, then leakage current ………..
Answer: Increases
36
If the doping level of a crystal diode is increased, the breakdown voltage………….
Answer: Is Decreased
37
When the graph between current through and voltage across a device is a straight line, the device is referred to as ……………….
Answer: Linear
38
When the crystal current diode current is large, the bias is …………
Answer: Forward
39
A zener diode is destroyed if it…………..
Answer: carrier more than rated current
40
A series resistance is connected in the zener circuit to………..
Answer: protect the zener
