Electronic Devices and Circuits - Engineering

Q1:

At very high temperatures the extrinsic semi conductors become intrinsic because

A drive in diffusion of dopants and carriers

B band to band transition dominants over impurity ionization

C impurity ionization dominants over band to band transition

D band to band transition is balanced by impurity ionization

ANS:B - band to band transition dominants over impurity ionization

Covalent bonds are broken.