Moodle-3 ECE- 2022-2023

Thermal conductivity in a metal is proportional to the temperature

• True

• False

• Cannot say

The electrical conductivity of a metal is directly proportional to the temperature.

•   True   

• False

• Cannot say

If temperature increases, the Fermi level in an n-type semiconductor

•     Comes down  

• goes up 

• cannot say

If temperature increases, the Fermi level in an p-type semiconductor

• Comes down  

• goes up  

• cannot say

If temperature increases, then the p-type semiconductor behaves like an intrinsic semiconductor.

• True  

• False   

• Cannot say

If temperature increases, then the n-type semiconductor behaves like an intrinsic semiconductor.

• True  

• False 

• Cannot say

Resistivity is inversely proportional to electrical conductivity.

• True  

• False  

• Cannot say

     Drift velocity per unit electric field is called

• Mobility

• current density

• potential

Electric field intensity implies

• Potential

• Work done

• force

The addition of a pentavalent impurity to a tetravalent element produces an ----------semiconductor.

• p-type

• None of the above

• n-type