Semiconductor Materials – 3 – 5

121. In p-type semiconductor :

(a) Holes form the majority carrier
(b) Free electrons form the minority carrier
(c) Hole density is equal to electron density
(d) It is formed by adding pentavalent impurity

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

122. In an intrinsic semiconductor, Fermi level represents the energy level with probability of its occupation of :

(a) 0 per cent
(b) 25 per cent
(c) 50 per cent
(d) 75 per cent

ANSWER
Answer : (c)

EXPLANATION
No answer description available for this question. Let us discuss.

123. In germanium, medium doping corresponds to impurity of the order :

(a) 1 part in 105
(b) 1 part in 104
(c) 1 part in 103
(d) 1 part in 10
2

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

124. Forbidden energy gap between the valence and conduction bands is least in the case of :

(a) Pure Si
(b) Pure Ge
(c) Mica
(d) Impure Si

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

125. Through repeated zone refining, the residual impurity in a semiconductor is of the order :

(a) 1 part in 104
(b) 1 part in 107
(c) 1 part in 109
(d) 1 part in 1011

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

1 2 3 4 5 6 7 8 9 10

Be a Part of The New & Next

MCQs fb  MCQs G+

Share the Knowledge

GATE Total InfoGATE 2019 BooksFree Notes
IES Total InfoIES 2019 BooksFree Mock tests
JAM Total InfoJAM 2019 BooksEngg Diploma
PSUs Total InfoM Tech Total InfoUGC NET Total Info

General Knowledge Books

McqSeries.com is an online forum for multiple choice questions. This forum would be really-really helpful for those candidates who are preparing for examination conducted by Union Public Service Commission (like Civil Services Examination, Engineering Services Examination, Special Class Railway Apprentice, National Defence Academy, Combined Defence Services, etc.), Staff Selection Commission (like Combined Graduate Level, Junior Engineer, Food Corporation of India etc.), various public sector units (like DRDO, DMRC, BARC, BSNL, ONGC, etc.), Graduate Aptitude Test in Engineering, Indian Institute of Technology Entrance Examination etc. and many other national and state level examination.

Leave a Reply

Your email address will not be published. Required fields are marked *

Shares
GATE, IES & PSUs Total Information & GuidanceCheck Here!
Copy Protected by Chetan's WP-Copyprotect.