Semiconductor Electronics: Materials, Devices and Simple Circuits MCQs for NEET — Physics Questions with Answers

A and C                     

A and D

B and C                     

B and D

Doping increases conductivity

Temperature coefficient of resistance is negative

Resisitivity is in between that of a conductor and insulator

At absolute zero temperature, it behaves like a conductor

Ohm’s Law

Pauli’s exclusion principle

Bohr’s theory

Heisenberg’s uncertainty principle

Current is mainly carried by holes

Current is mainly carried by electrons

The material is always positively charged

Doping is done by pentavalent material

Boron                     

Gallium

Aluminium             

All of these

Element semiconductor

Alloy semiconductor

Bad conductor

Metallic semiconductor

 ${\mathrm{n}}_{\mathrm{e}}$>> ${\mathrm{n}}_{\mathrm{h}}$               

  ${\mathrm{n}}_{\mathrm{e}}$<< ${\mathrm{n}}_{\mathrm{h}}$  

 ${\mathrm{n}}_{\mathrm{e}}$$\le$${\mathrm{n}}_{\mathrm{h}}$                 

 ${\mathrm{n}}_{\mathrm{e}}$ = ${\mathrm{n}}_{\mathrm{h}}$  

Monovalent         

Divalent

Trivalent               

Pentavalent

 $1.12\times {10}^{-19}$        

$1.76\times {10}^{-19}$

  $1.6\times {10}^{-19}$         

Zero

$∆{\mathrm{Eg}}_{\mathrm{c}}<∆{\mathrm{Eg}}_{\mathrm{insulator}}<∆{\mathrm{Eg}}_{sc}$

$∆{\mathrm{Eg}}_{\mathrm{c}}<∆{\mathrm{Eg}}_{\mathrm{sc}}<∆{\mathrm{Eg}}_{\mathrm{insulator}}$

$∆∆{\mathrm{Eg}}_{\mathrm{sc}}<∆{\mathrm{Eg}}_{\mathrm{insulator}}<{\mathrm{Eg}}_{\mathrm{c}}$

$∆{\mathrm{Eg}}_{\mathrm{sc}}<∆Ec<∆{\mathrm{Eg}}_{\mathrm{insulator}}$