Q. Silicon is a semiconductor. If a small amount of $As$ is added to it, then its electrical conductivity
A) Decreases
B) Increases
C) Remains unchanged
D) Becomes zero
Explanation
(b) Impurity increases the conductivity
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.