Difference between Insulator, Semiconductor & Conductor

(1) Insulators
(2) Semiconductors
(3) Conductors


Figure 1 – Energy band diagrams for (a) an insulator (b) a semiconductor, and (c) a conductor

Ev = Top edge of the valence band,
Ec = Bottom edge of the conduction band,
Eg = Bandgap energy or energy gap, Eg = Ec – Ev.

Table 1 – Difference between insulators, semiconductors & Conductors in tabular form

Charactiristics Insulator Semiconductor Conductor
1. Conductivity The conductivity of insulator is very low. The conductivity of semiconductor is moderate. The conductivity of conductor is very high.
2. Resistivity It has very high resistivity. It has moderate resistivity. It has very low resistivity.
3. Forbidden gap It has large forbidden gap. It has small forbidden gap. It has no forbidden gap.
4. Temperature coefficient of resistance Insulator has negative temperature coefficient of resistance. Semiconductor has negative temperature coefficient of resistance Conductor has positive temperature coefficient of resistance.
5. Electrons availability There is small number of electrons available for conduction. There is moderate number of electrons available for conduction. There is large number of electrons available for conduction.
6. Examples Paper, Mica glass. Silicon, Germanium. Metals, aluminium, copper.

Table 2 – Comparing of resistivity between insulators, semiconductors & Conductors in tabular form

S. No. Substance Nature Resistivity
1. Glass Insulator 9 ×1011 Ωm
2. Germanium Semiconductor 0.6 Ωm
3. Copper Good conductor 1.7 ×10−8 Ωm

1 2
Semiconductor Materials – Mcq
Semiconductor Materials – Notes
Semiconductor Materials – IQ

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
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.