When on impurity is doped into an intrinsic semiconductor, the conductivity of the semiconductor

Options

A. increases
B. decreases
C. remains the same
D. becomes zero

Answer

C

Explanation

By dopoing, the band gap reduce from 1eV to 0.3 to 0.7 eV & electron can achieve this energy (0.3eV to 0.7eV) at room temperature & reach in C.B (conduction band).