Q. Which impurity is doped in $Si$ to form $N$-type semi-conductor
A) $Al$
B) $B$
C) $As$
D) None of these
Explanation
(c) Because As is pentavalent impurity
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.