Semiconductor Materials – 4 – 2

156. A p-type semiconductor is :
1. A silicon crystal doped with arsenic impurity.
2. A silicon crystal doped with aluminium impurity.
3. A germanium crystal doped with boron impurity.
4. A germanium crystal doped with phosphorus impurity.

(a) a, c are correct
(b) a, d are correct
(c) b, c are correct
(d) b, d are correct

ANSWER
Answer : (c)

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

157. Certain substances lose their electrical resistance completely at finite low temperature. Such substances are called :

(a) Semiconductors
(b) A good insulator
(c) P-type semiconductor
(d) N-type semiconductor

ANSWER
Answer : (d)

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

158. An intrinsic semiconductor has :

(a) Zero resistance at 0˚C
(b) An infinite resistance at 0˚C
(c) A finite resistance which decreases with increases in temperature
(d) A finite resistance which increases with increases in temperature

ANSWER
Answer : (c)

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

159. The addition of pentavalent impurity to a semiconductor creates more :

(a) Free electrons
(b) Holes
(c) Positrons
(d) Free electrons and holes

ANSWER
Answer : (a)

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

160. Reverse bias on a junction diode :

(a) Lower the junction potential barrier
(b) Raises the junction potential barrier
(c) Greatly increases the minority carriers
(d) Greatly increases the majority carriers

ANSWER
Answer : (b)

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

MORE INFORMATION
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
ENGINEERING BRANCHES
Aerospace EngineeringCivil Engineering Physics
Geology and GeophysicsMining EngineeringComputer Science
Agricultural Engineering Chemical Engineering Architecture and Planning
Instrumentation EngineeringMetallurgical EngineeringElectrical Engineering
Production and Industrial EngineeringElectronics and Communication EngineeringTextile Engineering and Fibre Science
MathematicsInformation TechnologyEngineering Sciences
Biotechnology Petroleum EngineeringLife Sciences
Mechanical EngineeringChemistry
What is McqSeries.com?

McqSeries.com is an online forum for multiple choice questions. This forum would be really-really helpful for those candidates who are preparing for various technical as well as non-technical examinations.

Why McqSeries.com?

Here at McqSeries.com you will find all important Mcqs, Notes, Interview Questions useful for 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 (GATE), Indian Institute of Technology Entrance Examination(IIT-JEE) etc. and many other national and state level examination.

Leave a Reply

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

Copy Protected by Chetan's WP-Copyprotect.