1
The capacitance of a reverse biased PN junction
Answer: Increases as reverse bias is decreased
Questions
2
For a PN junction diode, the current in reverse bias may be
Answer: Few micro or nano amperes
3
A PN junction is formed in a process which may be of
Answer: Any of the above
4
The depletion layer of a PN junction diode has
Answer: Neither free mobile electrons nor holes
5
The potential barrier existing across a PN junction corresponds to
Answer: Height of the barrier
6
The p-region has a greater concentration of __________ as compared to the n-region in a P-N junction.
Answer: holes
7
In the p & n regions of the p-n junction the _________ & the ___________ are the majority charge carriers respectively.
Answer: holes, electrons
8
The n-region has a greater concentration of _________ as compared to the p-region in a P-N junction diode.
Answer: electrons
9
Which of the below mentioned statements is false regarding a p-n junction diode?
Answer: Diodes have three terminals
11
When semiconductor is doped half with trivalent and half with pentavalent impurities, junction formed is known as
Answer: PN junction
14
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
15
Which of the following is true in case of an unbiased p-n junction diode?
Answer: Charges establish an electric field across the junctions
16
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
17
Lets assume that the doping density in the p-region is 10-9 cm-3 & in the n-region is 10-17cm-3, as such the p-n junction so formed would be termed as a
Answer: p+ n–
18
In the p & n regions of the p-n junction the _________ & the ___________ are the minority charge carriers respectively.
Answer: electrons, holes
19
A p-type semiconductor material is doped with ____________ impurities whereas a n-type semiconductor material is doped with __________ impurities
Answer: acceptor, donor
20
Mobile electrons of P-side of the PN junction diode constitute
Answer: Minority current carriers
