Physics MCQs for NEET — Practice Questions with Answers

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

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

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

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

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

Large number of holes and few electrons

Large number of free electrons and few holes

Equal number of free electrons and holes

No electrons or holes

Metals               

Superconductors

Insulators         

Semiconductors

Drouping       

Drooping

Doping           

None of these

A conductor

A P-type semiconductor

An N-type semiconductor

An insulator

Trivalent elements       

Pentavalent elements

In both the above       

None of these