Semiconductor Materials – 4 – 6

176. Which of the following is not a semiconductor –

(a) Silicon
(b) Germanium
(c) Arsenic
(d) Selenium

ANSWER
Answer : (c)

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

177. A Silicon crystal becomes p- type when –

(a) Code to very low temperature
(b) Alloyed with germanium
(c) Doped with boron atoms
(d) Doped with arsenic atom

ANSWER
Answer : (c)

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

178. Carbon is said to be semiconductor. But –

(a) Graphite and diamond are good conductor
(b) Graphite and diamond are also semiconductor
(c) Graphite is good conductor but diamond is bad conductor
(d) Graphite is bad conductor but diamond is good conductor

ANSWER
Answer : (c)

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

179. In case of semiconductors the width of forbidden gap is about –

(a) 0.01 eV
(b) 10 eV
(c) 100 eV
(d) 1 eV

ANSWER
Answer : (d)

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

180. Arrange different materials in ascending order of their resistivity –

(a) Insulators – Semiconductors – Metals
(b) Semiconductors – insulators – metals
(c) Metals – semiconductors – insulators
(d) Insulators – Metals – semiconductors

ANSWER
Answer : (c)

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

1 2 3 4 5 6 7 8

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Your email address will not be published.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.